^{Fundamental Quantum Physics Lab}

_{Peter Engels}

**Journal Publications**

**2021**

M. E. Mossman, T. M. Bersano, M. M. Forbes, and P. Engels, “Catastrophe Atom Optics: Fold and Cusp Caustics in an Atom Laser”, arXiv:2104.13535

**2020**

M. E. Mossman, E. S. Delikatny, M. M. Forbes, and P. Engels, “Stability in turbulence: The interplay between shocks and vorticity in a superfluid with higher-order dispersion”, published 10 November 2020 in Phys. Rev. A **102**, 053310 as an Editor’s Suggestion piece.

Q. Guan, M. K. H. Ome, T. M. Bersano, S. Mossman, P. Engels & D. Blume, “Non-exponential tunneling due to mean-field induced swallowtails”, published 20 November 2020 in Phys. Rev. Lett. **125**, 213401, arXiv version here.

G. C. Katsimiga, S. I. Mistakidis, T. M. Bersano, M. K. H. Ome, S. M. Mossman, K. Mukherjee, P. Schmelcher, P. Engels & P. G. Kevrekidis, “Observation and Analysis of Multiple Dark-Antidark Solitons in Two-Component Bose-Einstein Condensates,” published 3 August 2020 in Phys. Rev. A **102**, 023301.

**2019**

M. E. Mossman, Junpeng Hou, Xi-Wang Luo, Chuanwei Zhang & P. Engels, “Experimental realization of a non-magnetic one-way spin switch,” published 29 July 2019 in Nature Communications **10**: 3381 as an Editor’s Highlight piece, arXiv version here.

Thomas M. Bersano, Junpeng Hou, Sean Mossman, Vandna Gokhroo, Xi-Wang Luo, Kuei Sun, Chuanwei Zhang & Peter Engels, “Experimental realization of a superfluid stripe phase in a spin-orbit-coupled Bose-Einstein condensate enabled by momentum-space hopping,” published 30 May 2019 in Phys. Rev A **99**, 051692, arXiv version here.

**2018**

M. E. Mossman, M. A. Hoefer, K. Julien, P. G. Kevrekidis, & P. Engels, “Turbulence-induced viscous dissipation in a quantum mechanical piston shock,” published 7 Nov 2018 in Nature Communications 9(1): 4665, arXiv version here.

Junpeng Hou, Xi-Wang Luo, Kuei Sun, Thomas Bersano, Vandna Gokhroo, Sean Mossman, Peter Engels & Chuanwei Zhang, “Momentum Space Josephson Effects,” published Mar 23, 2018 in Phys. Rev. Lett. **120**, 120401 as a Editor’s suggestion piece.

T. M. Bersano, V. Gokhroo, M. A. Khamehchi, J. D’Ambroise, D. J. Frantzeskakis, P. Engels, & P. G. Kevrekidis, “Three-component soliton states in spinor F=1 Bose-Einstein condensates,” published 6 February 2018 in Phys. Rev. Lett. 120, 063202 (arXiv: 1705:08130).

**2017**

M. A. Khamehchi, Khalid Hossain, M. E. Mossman, Yongping Zhang, Th. Busch, Michael McNeil Forbes, and P. Engels, “Negative mass hydrodynamics in spin-orbit-coupled Bose-Einstein condensates”, published 10 April 2017 in Physical Review Letters 118, 155301 (arXiv: 1612.04055) as an Editor’s Choice piece.

**2016**

I. Danaila, M.A. Khamehchi, V. Gokhroo, P. Engels, P.G. Kevrekidis, “Vector Dark-Antidark Solitary Waves in Multi-Component Bose-Einstein condensates”, published 18 Nov 2016 in Physics Review A **94**, 053617 (submitted 17 June 2016, arXiv: 1606.05607).

Yongping Zhang, Maren Elizabeth Mossman, Thomas Busch, Peter Engels, & Chuanwei Zhang, Properties of spin-orbit-coupled Bose-Einstein condensates, Frontiers of Physics 11: 118103 (2016).

M. A. Khamehchi, Chunlei Qu, M. E. Mossman, Chuanwei Zhang, & Peter Engels, Spin-momentum coupled Bose-Einstein condensates with lattice band pseudospins, Nature Communications **7**: 10867 (2016), arXiv version here.

**2015**

C. Hamner, Yongping Zhang, M. A. Khamehchi, Matthew J. Davis, P. Engels, Spin-orbit coupled Bose-Einstein condensates in a one-dimensional optical lattice, Phys. Rev. Lett. 114, 070401 (2015), arXiv version here.

**2014**

M. A. Khamehchi, Yongping Zhang, Chris Hamner, Thomas Busch, and Peter Engels, Measurement of collective excitations in a spin-orbit-coupled Bose-Einstein condensate, Phys. Rev. A **90**, 063624 (2014).

Chris Hamner, Chunlei Qu, Yongping Zhang, JiaJia Chang, Ming Gong, Chuanwei Zhang, Peter Engels, Dicke-type phase transition in a spin-orbit coupled Bose-Einstein condensate, Nature Communications **5**, 4023 (2014), arXiv version here.

**2013**

C. Hamner, Yongping Zhang, J.J. Chang, Chuanwei Zhang, P. Engels, Phase Winding a Two-Component BEC in an Elongated Trap: Experimental Observation of Moving Magnetic Orders and Dark-bright Solitons, Phys. Rev. Lett **111**264101 (2013) , arXiv version here.

Chunlei Qu, Chris Hamner, Ming Gong, Chuanwei Zhang, and Peter Engels, Observation of Zitterbewegung in a spin-orbit-coupled Bose-Einstein condensate, Phys. Rev. A **88**, 021604 (2013) , arXiv version here.

A. Alvarez, J. Cuevas, F.R. Romero, C. Hamner, J.J. Chang, P. Engels, P.G. Kevrekidis and D.J. Frantzeskakis, Scattering of atomic dark-bright solitons from narrow impurities, J. Phys. B: At. Mol. Opt. Phys. **46**, 065302 (2013), arXiv version here.

**2012**

D. Yan, J.J. Chang, C. Hamner, M. Hoefer, P.G. Kevrekidis, P. Engels, V. Achilleos, D.J. Frantzeskakis and J. Cuevas, Beating dark-dark solitons in Bose-Einstein condensates, J. Phys. B: At. Mol. Opt. Phys., **45** 115301 (2012) doi:10.1088/0953-4075/45/11/115301, arXiv version here.

**2011**

D. Yan, J.J. Chang, C. Hamner, P.G. Kevrekidis, P. Engels, V. Achilleos, D. J. Frantzeskakis, R. Carretero-Gonzalez, P. Schmelcher, Multiple dark-bright solitons in atomic Bose-Einstein condensates, Phys. Rev. A **84**, 053630 (2011) , arXiv version here.

S. Middelkamp, J.J. Chang, C. Hamner, R. Carretero-Gonzalez, P.G. Kevrekidis, V. Achilleos, D.J. Frantzeskakis, P. Schmelcher, P. Engels, Dynamics of dark-bright solitons in cigar-shaped Bose-Einstein condensates, Physics Letters A **375**, 642 (2011), arXiv version here.

M.A. Hoefer, J.J. Chang, C. Hamner, and P. Engels, Dark-dark solitons and modulational instability in miscible two-component Bose-Einstein condensates, Phys. Rev. A **84**, 041605 (2011), arXiv version here.

C. Hamner, J.J. Chang, P. Engels, and M. A. Hoefer, Generation of Dark-Bright Soliton Trains in Superfluid-Superfluid Counterflow, Phys. Rev. Lett. **106**, 065302 (2011), arXiv version here.

**2010**

P. Engels, Observing the dance of a vortex-antivortex pair, step by step, Physics 3, 33 (2010).

**2009**

M. A. Hoefer, P. Engels, and J.J. Chang, Matter-Wave Interference in Bose-Einstein Condensates: a dispersive hydrodynamic perspective, Physica D 238, 1311 (2009).

**2008**

J.J. Chang, P. Engels, and M. A. Hoefer, Formation of Dispersive Shock Waves by Merging and Splitting Bose-Einstein Condensates, Phys. Rev. Lett. 101, 170404 (2008).

M. A. Hoefer, M. J. Ablowitz, and P. Engels, Piston Dispersive Shock Wave Problem, Phys. Rev. Lett. 100, 084504 (2008).

**2007**

P. Engels and C. Atherton, Stationary and Nonstationary Fluid Flow of a Bose-Einstein Condensate Through a Penetrable Barrier, Phys. Rev. Lett. 99, 160405 (2007).

P. Engels, C. Atherton, and M. A. Hoefer, Observation of Faraday Waves in a Bose-Einstein Condensate, Phys. Rev. Lett. 98, 095301 (2007).

**2006**

M. A. Hoefer, M. J. Ablowitz, I. Coddington, E. A. Cornell, P. Engels, and V. Schweikhard, Dispersive and classical shock waves in Bose-Einstein condensates and gas dynamics, Phys. Rev. A 74, 023623 (2006).

**2005**

T. P. Simula, P. Engels, I. Coddington, V. Schweikhard, E. A. Cornell, and R. J. Ballagh, Observations on Sound Propagation in Rapidly Rotating Bose-Einstein Condensates, Phys. Rev. Lett. 94, 080404 (2005).

**2004 and earlier**

V. Schweikhard, I. Coddington, P. Engels, S. Tung, and E. A. Cornell, Vortex-Lattice Dynamics in Rotating Spinor Bose-Einstein Condensates, Phys. Rev. Lett. 93, 210403 (2004).

I. Coddington, P. C. Haljan, P. Engels, V. Schweikhard, S. Tung, and E. A. Cornell, Experimental studies of equilibrium vortex properties in a Bose-condensed gas, Phys. Rev. A 70, 063607 (2004).

V. Schweikhard, I. Coddington, P. Engels, V. P. Mogendorff, and E. A. Cornell, Rapidly Rotating Bose-Einstein Condensates in and near the Lowest Landau Level, Phys. Rev. Lett. 92, 040404 (2004).

I. Coddington, P. Engels, V. Schweikhard, and E. A. Cornell, Observation of Tkachenko Oscillations in Rapidly Rotating Bose-Einstein Condensates, Phys. Rev. Lett. 91, 100402 (2003).

P. Engels, I. Coddington, P. C. Haljan, V. Schweikhard, and E. A. Cornell, Observation of Long-lived Vortex Aggregates in Rapidly Rotating Bose-Einstein Condensates, Phys. Rev. Lett. 90, 170405 (2003).

A. Callegari, R. Pearman, S. Choi, P. Engels, H. K. Srivastava, M. Gruebele, K.K. Lehmann, and G. Scoles, Intramolecular Vibrational Relaxation in aromatic molecules II: An experimental and computational study of pyrrole and triazine, Molecular Physics 101, 551-568 (2003).

P. Engels, I. Coddington, P. C. Haljan, and E. A. Cornell, Nonequilibrium Effects of Anisotropic Compression Applied to Vortex Lattices in Bose-Einstein Condensates, Phys. Rev. Lett. **89**, 100403 (2002).

P. Engels, W. Ertmer, and K. Sengstock, Magnetic guiding of a slow metastable Ne* beam, Optics Communications **204**, 185 (2002).

P. C. Haljan, I. Coddington, P. Engels, and E. A. Cornell, Driving Bose-Einstein-condensate vorticity with a rotating normal cloud, Phys. Rev. Lett. **87**, 210403/1 (2001).

A. Callegari, U. Merker, P. Engels, H. K. Srivastava, K. K. Lehmann, and G. Scoles, Intramolecular vibrational redistribution in aromatic molecules. I. Eigenstate resolved CH stretch first overtone spectra of benzene, J. Chem. Phys. **113**, 10583 (2000).

P. Engels, S. Salewski, H. Levsen, K. Sengstock, and W. Ertmer, Atom lithography with a cold metastable neon beam, App. Phys. B **69**, 407(1999).

U. Merker, P. Engels, F. Madeja, M. Havenith, and W. Urban, High-resolution CO-laser sideband spectrometer for molecular-beam optothermal spectroscopy in the 5-6.6 m wavelength region, Rev. Sci. Instrum. **70**, 1933 (1999).

**Theses**

**Nonlinear phenomena and stripe-phases in Bose-Einstein condensates.**

PhD Thesis, Thomas Bersano (2019).

*Nonlinear dynamics and shock structures in elongated Bose-Einstein condensates.*

PhD Thesis, Maren Mossman (2019). pdf

*Dispersion engineering of Bose-Einstein condensates.*

PhD Thesis, Amin Khamehchi (2017).

*Experiments with dispersion engineered Bose-Einstein condensates: Raman dressing and novel optical lattices.*

PhD Thesis, Chris Hamner (2014). pdf

*Quantum hydrodynamics in one- and two-component Bose-Einstein condensates.*

PhD Thesis, JiaJia Chang (2013). pdf

**Invited Talks / Seminar Presentations**

**2020**

P. Engels, “Lattice experiments with Raman dressed Bose-Einstein condensations”, invited talk at the 51st Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 4, 2020.

P. Engels, “Quantum technologies at WSU: Ultracold atoms in space,” invited talk at the Northwest Quantum Nexus workshop for Quantum Computing, Sensing and Simulation with Cold Atoms, Washington State University, Pullman, WA Feb 21, 2020.

P. Engels, “Ultracold atoms in space,” invited talk for the Physics SLAM competition at the Northwest Section of the Conference for Undergraduate Women in Physics, Washington State University, Pullman, WA, Jan 18, 2020.

**2019**

P. Engels, “Studying few-body physics and collective phenomena in microgravity”, invited talk given at the BECCAL Brainstorming Workshop, DLR Institute of Quantum Technologies, Ulm, Germany December 12-13, 2019.

P. Engels, “Raman dressing of BECs: from modified dispersions to novel hydrodynamics and phases of matter”, invited talk given at the Joint Quantum Institute, University of Maryland, November 18, 2019.

Peter Engels, “Spin-orbit coupled BECs: novel hydrodynamics and phases of matter”, invited talk at the Workshop on dynamics and interactions in quantum gases, Mahon, Menorca, Spain, Sept. 5, 2019.

P. Engels, “Coupled two-component mixtures: from engineered dispersions to novel phases of matter”, invited talk at the *Workshop on Quantum Mixtures*, Trento, Italy, July 15-17 2019.

Peter Engels, “Observation of barrier induced shock and spin dynamics in elongated BECs”, invited talk for the *Quantum Turbulence: Cold Atoms, Heavy Ions, and Neutron Stars* Workshop at the Institute for Nuclear Theory, University of Washington, April 1, 2019.

Peter Engels, “Ultracold physics and quantum technology”, invited presentation given to WSU Physics Club, WSU, Pullman, WA, February 8, 2019.

**2018**

Peter Engels, “Raman-dressed Bose-Einstein condensates: artificial gauge fields, spin-orbit coupling and negative mass hydrodynamics”, invited seminar in the Physics Department, University of Washington, Seattle, WA, December 6, 2018.

P. Engels, “Dilute gas Bose-Einstein condensates with higher order dispersions: experiments with artificial gauge fields and negative mass hydrodynamics”, invited seminar talk at Shanghai University, China, November 21, 2018.

Thomas Bersano, Sean Mossman, Vandna Gokhroo, and Peter Engels, “A tunneling assisted, spin-orbit coupled Bose-Einstein condensate exhibiting supersolid-like behavior”, invited seminar talk at Shanghai University, China, November 22, 2018.

Sean Mossman, Maren Mossman, Thomas Bersano, and Peter Engels, “Realization of a nonmagnetic, unidirectional spin switch using spin-orbit coupling in Bose Einstein condensates”, invited seminar talk at Shanghai University, China, November 22, 2018.

P. Engels, “From artificial gauge fields to negative-mass hydrodynamics: Studying quantum mechanics with ultracold atoms”, invited talk at the Physics Colloquium, University of Oklahoma, Norman, OK, September 27, 2018.

P. Engels, “Novel phases and quantum dynamics in a spin-orbit coupled BEC”, invited talk at the AMO/CM seminar, University of Oklahoma, Norman, OK, September 28, 2018.

P. Engels, “Inducing and probing dynamics in a spin-orbit coupled BEC”, invited talk given at the 49th Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, Fort Lauderdale, FL, May 31, 2018.

P. Engels, “Experimental methods of ultracold quantum gases”, guest lectures for graduate class at OIST (Okinawa Institute of Science and Technology), Okinawa, Japan, March 14 and 20, 2018.

P. Engels, “Excitation dynamics in spin-orbit coupled BECs”, invited seminar talk given at OIST (Okinawa Institute of Science and Technology), Okinawa, Japan, March 13, 2018.

**2017**

Peter Engels, *Views beyond the classical world: The quantum mechanical foundation of nature*, invited talk given to Pullman Rotary Club, Sept. 20, 2017, Pullman, WA.

Peter Engels, *Negative-mass quantum hydrodynamics with spin-orbit coupled BECs*, invited talk given at the conference “Bose-Einstein condensation 2017: Frontier in quantum gases”, September 2 – 8, 2017, Sant Feliu de Guixols, Spain

Artificial gauge fields in dilute-gas Bose-Einstein condensates: novel experimental studies of quantum dynamics, invited seminar talk at OIST, Okinawa, Japan, March 2, 2017.

Quantum gas research at WSU: From artificial gauge fields to negative-mass hydrodynamics, invited talk at WSU Physics Colloquium, Feb 7 2017.

**2016**

Experiments with spin-orbit coupled Bose-Einstein Condensates, invited seminar talk at the MIT-Harvard Center for Ultracold Atoms, Boston, MA, November 2016.

Artificial Gauge Fields in Bose-Einstein Condensates, invited seminar talk at NC State, Raleigh, NC, October 17, 2016

Few-body studies in microgravity, invited seminar in Quantum Systems Unit, OIST (Okinawa Institute of Science and Technology), Japan, March 2016.

Experimental methods of ultracold quantum gases, guest lecture for graduate class at OIST, Okinawa, Japan, March 15, 2016.

Spin-orbit coupled Bose-Einstein condensates: Raman dressing and lattice-band pseudospins, invited seminar talk at OIST, Japan, March 9, 2016.

**2015**

Experiments with Raman dressed BECs and Floquet Bloch systems, invited talk at the conference Bose-Einstein Condensation 2015 – Frontiers in Quantum Gases, Sant Feliu de Guixols, Spain, September 5-11, 2015.

Artificial gauge fields in dilute-gas Bose-Einstein condensates, invited talk at the workshop Dispersive Hydrodynamics ~ The Mathematics of Dispersive Shock Waves and Applications, Banff International Research Station, Banff, CA, May 17-22, 2015.

Quantum mechanics near absolute zero: Experiments with Bose-Einstein condensates, invited seminar talk at the University of Puget Sound, Tacoma, WA, April 24, 2015.

Simulating condensed matter with ultracold atoms: Artificial gauge fields and spin-orbit coupling in dilute-gas BECs, invited talk at the physics colloquium, University of Idaho, Moscow, ID, April 20, 2015.

Engineering dispersion relations with a spin-orbit coupled Bose-Einstein condensate, invited talk at the Ninth IMACS International Conference on Nonlinear Evolution Equations and Wave Phenomena: Computation and Theory, Athens, GA, April 1-4, 2015.

Experimental methods of ultracold atoms, guest lecture for graduate class at OIST, Okinawa, Japan, March 10, 2015.

Artificial gauge fields and spin-orbit coupling in dilute-gas BECs, invited seminar talk at OIST (Okinawa Institute of Science and Technology), Japan, March 5, 2015.

**2014**

Experiments with Bose-Einstein Condensates in a Spin-Orbit Coupled Optical Lattice, invited talk at Frontiers in Optics / Laser Science (FiO/LS) 2014, Tucson, Arizona, October 19-23, 2014.

Experimental investigation of spin-orbit coupled BECs, invited talk at the 45th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP 2014), Madison Wisconsin, June 2-6, 2014.

BECs in artificial gauge fields: Simulating condensed matter Hamiltonians with ultracold atoms, invited talk at the WSU Physics Colloquium, WSU, April 1, 2014.

Novel dynamics in superfluid-superfluid counterflow – quantum hydrodynamics with dilute-gas Bose-Einstein condensates, group colloquium of the Quantum Systems Unit, OIST, Okinawa, Japan, March 17-21, 2014.

Quantum mechanics near absolute zero – Bose-Einstein condensates and Degenerate Fermi gases, guest lecture for Advanced Condensed Matter class at OIST, Okinawa, Japan, March 17-21, 2014.

Experiments with BEC’s in a spin-orbit coupled lattice, invited OIST seminar talk, OIST, Okinawa, Japan, March 17-21, 2014.

Experimental investigation of spin-orbit coupled BECs, invited talk at the APS March meeting, Denver, CO, March 3-7, 2014.

Experiments with BECs in a spin-orbit coupled lattice, invited talk at the CIFAR Cold Atoms Workshop, Banff, Canada, February 19-21, 2014.

**2013**

Investigating quantum dynamics with Bose-Einstein Condensates, invited talk at the Eighth IMACS International Conference on Nonlinear Evolution Equations and Wave Phenomena: Computation and Theory, University of Georgia, Athens, GA, March 25-28, 2013.

New trends in BEC hydrodynamics: novel types of solitons and dispersion engineeering, AMO Physics Seminar, Stony Brook University, Stony Brook, New York, February 4, 2013.

**2012**

Superfluid hydrodynamics with Bose-Einstein condensates: engineering quantum dynamics, The School of Natural Sciences physics seminar, University of California, Merced, November 30, 2012.

Quantum hydrodynamics in dilute-gas Bose-Einstein condensates, invited talk at the 14th Annual Meeting of the Northwest Section of the APS, Vancouver, BC, Canada, October 18-20, 2012.

From Superfluid Counterflow to Novel Types of Solitons: Quantum Hydrodynamics with Dilute-gas Bose-Einstein Condensates, invited talk at the SIAM Conference on Nonlinear Waves and Coherent Structures, University of Washington, Seattle, June 13-16, 2012.

Novel dynamics in superfluid-superfluid counterflow, invited talk at the Physics Colloquium, North Carolina State University, April 16, 2012.

From superfluid-superfluid counterflow to novel types of solitons: Quantum hydrodynamics with dilute-gas Bose-Einstein Condensates, invited talk at AMO seminar, Yale University, January 12, 2012.

**2011**

From superfluid counterflow to novel types of solitons ~ Quantum hydrodynamics with dilute-gas Bose-Einstein Condensates, invited talk at Condensed Matter Seminar, Purdue University, November 11, 2011.

Nonlinear hydrodynamics in binary Bose-Einstein Condnsates: Superfluid counterflow and novel types of solitons, invited talk at The Seventh IMACS International Conference on Nonlinear Evolution Equations and Wave Phenomena, Athens, GA, April 4-7, 2011.

**2010**

Nonlinear Quantum Hydrodynamics – Shocks, Superfluid-superfluid Counterflow and Novel Types of Solitons, invited talk at KITP Program: Beyond Standard Optical Lattices, UCSB, December 7, 2010.

“Quantum hydrodynamics in ultracold atomic gases”, invited talk given at The Second International Conference: Nonlinear Waves – Theory and Applications , Beijing, June 26-29, 2010.

Matter-wave Interference in Bose-Einstein Condensates: a dispersive hydrodynamics perspective, invited talk at March Meeting 2010, Portland, Oregon, March 15-19, 2010.

**2008**

Soliton formation during the cooling, merging and splitting of BECs, invited talk at the 39th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP 2008), State College, Pennsylvania, May 27-31, 2008.

Nonlinear Dynamics in BECs ~ Quantum Shocks, Solitons, and Farady Waves, invited talk at the James Franck Institute, University of Chicago, May 20, 2008.

Nonlinear Dynamics in BECs ~ Faraday waves, solitons and quantum shock, invited talk at the Quantum Lunch seminar, Los Alamos National Lab, March 6, 2008.

Quantum hydrodynamics in BECs: From soundwaves to quantum shock, invited talk at the 38th Winter Colloquium on the Physics of Quantum Electronics, Snowbird, Utah, January 6-10, 2008.

**2007**

Faraday waves and solitons in a BEC, invited talk given at the conference

“Bose-Einstein Condensation 2007, Frontiers in Quantum Gases”, Sant Feliu de Guixols, Spain, September 15-20, 2007.

Quantum Hydrodynamics – the peculiar superflow of BECs, invited talk given at the Australian National University (ANU), Canberra, Australia, July 4, 2007.

Quantum Hydrodynamics of Dilute-Gas Bose-Einstein Condensates, invited talk given in at the quantum turbulence tutorial at the APS March meeting, Denver, CO, March 4, 2007.

**2006**

Nonlinear quantum hydrodynamics in Bose-Einstein Condensates, invited talk in the Condensed Matter and Atomic Physics seminar series, University of Washington, Seattle, November 14, 2006.

Quantum Hydrodynamics in Bose-Einstein Condensates, invited talk at NWAPS meeting, University of Puget Sound, Tacoma, May 20, 2006.

Views beyond the classical world – Probing Quantum Mechanics with Bose-Einstein condensates, colloquium in the Department of Applied Mathematics, University of Washington, Seattle, February 28, 2006.

Hot topics in the ultracold, seminar talk given to Nonlinear Waves seminar in the Department of Applied Mathematics, University of Washington, Seattle, February 28, 2006.

**2005**

Experiencing the Quantum World – Modern Experiments with Bose-Einstein Condensates, physics seminar at the University of Idaho, Moscow, ID, October 24, 2005.

Quantum Hydrodynamics – the peculiar superflow of Bose-Einstein Condensates, invited talk at the University of Otago, Dunedin, New Zealand, June 13, 2005.

**2004 and earlier**

Experiments with Rotating Bose-Einstein Condensates, Nanophysics seminar, University of Hawaii at Manoa, April 30, 2004.

Physics with Rotating Bose-Einstein Condensates – Exploring a Spinning Quantum World, physics seminar at CCNY, New York, March 29, 2004.

Spinning up a BEC: from irrotational superfluid to crystal-like vortex matter, seminar of the NIST ion storage group, March 5, 2004

Probing Quantum Mechanics with Rotating Bose-Einstein Condensates, CAMP Seminar, Penn State University, Feb. 24, 2004

Rotating Bose-Einstein Condensates – Views on a Spinning Quantum World, physics colloquium, Washington State University, Pullman, Feb. 9, 2004.

Experiments in Quantum Fluid Dynamics – Vortex Lattice Dynamics and Shock Waves in a Bose-Einstein Condensate, SIAM Nonlinear Waves and Coherent Structures conference, Orlando, Florida, October 2-5, 2004.

Nonlinear dynamics with matter waves – experiments with Bose-Einstein condensates, invited talk at the 2003 Joint Central and Western Section Meeting of the American Mathematical Society, Boulder, Colorado, October 2-4, 2003.

Experiments with large vortex lattices in BECs, invited talk at the Institute for Laser Physics, Hamburg, Germany, June 19, 2003.

Experiments with rapidly rotating BECs, invited talk at the Second International Workshop: Theory of Quantum Gases and Quantum Coherence, Levico (Trento, Italy), June 12-14, 2003.

Vortex lattices in Bose Gases Under High Rotation Speeds, invited talk at the APS March Meeting, Austin, Texas, March 4, 2003.

Experiments with rotating Bose-Einstein Condensates – a macroscopic window into nature’s peculiar quantum mechanical behavior, invited talk at the Physics Colloquium, Auburn University, February 7, 2003.

Superfluidity, BEC and beyond, invited talk at the Institute for Laser Physics, Hamburg, Germany, October 4, 2002.

Vortex lines, lattices and vortex rings in a Bose-Einstein Condensate, invited talk at the 2002 AAAS Annual Meeting and Science Innovation Exposition, Boston, USA, February 14-19, 2002.

Quantized kinks and twists – topological structures in Bose-Einstein Condensates, invited talk at the CSU Physics Colloquium, Fort Collins, USA, October 15, 2001.

Experimental wavefunction engineering with BECs, invited talk at the conference “Soliton Equations: Applications and Theory”, Colorado Springs, USA , August 10-12, 2001.

Intrinsic Nucleation of Vortices, invited talk at the workshop “Fundamental Issues in Quantum Gases”, Aspen Center for Physics, Aspen, USA, 2001.

**Conference / workshop presentations**

**2021**

S. Mossman, M. K. H. Ome, A. Mukhopadhyay, E. Crowell, and P. Engels, “Spectroscopy of bulk excitations in a supersolid-like Bose-Einstein condensate”, poster presented at the BEC2021 conference, online and Sant Feliu de Guixols, Spain, September 11-17, 2021

M. Mossman, P. Engels, and M. M. Forbes, “Shock wave stabilization in superfluids with higher-order dispersion”, talk at the Society for Industrial and Applied Mathematics Annual Meeting 2021 (SIAM AN21), held online, July 19-23, 2021

M.K.H. Ome, A. Mukhopadhyay, E. Crowell, T. M. Bersano, M. Mossman, S. Mossman, and P. Engels, “Probing Quantum Phases and Dynamics with Dilute-Gas Bose-Einstein Condensates”, poster presented at the Munich Conference on Quantum Science and Technology 2021 (MCQST 2021), held online, July 19-23, 2021.

T. M. Bersano, S. Mossman, M. E. Mossman and P. Engels, “Observation of dense soliton trains in a dilute-gas Bose-Einstein condensate”, talk at the 52nd Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 1, 2021.

M. E. Mossman, T. M. Bersano, M. Forbes, and P. Engels, “Demonstration of fold and cusp caustics with a quasi-continuous atom laser”, talk at the 52nd Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 1, 2021.

P. Engels, M. E. Mossman, T. M. Bersano, and M. Forbes, “Studying caustics with a pulsed atom laser”, talk at the 52nd Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 1, 2021.

S. Mossman, M. K. H. Ome, E. Crowell, J. Hou, X. Luo, C. Zhang, and P. Engels, “Spectroscopy of bulk excitations in a supersolid-like Bose-Einstein condensate”, talk at the 52nd Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 2, 2021.

M. K. H. Ome, H. He, E. Crowell, S. Mossman, T. M. Bersano, Y. Zhang, and P. Engels, “Lattice Dynamics and Galilean Symmetry in a Zeeman Lattice”, talk at the 52nd Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 4, 2021.

**2020**

Peter Engels, “Quantum gas experiments at WSU”, talk at the WSU Research Week, Virtual Conference at WSU, October 15, 2020.

S. Mossman, M. K. H. Ome, J. Hou, C. Zhang & P. Engels, “Excitations in a spin-orbit-coupled stripe phase,” talk at the 51st Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 5, 2020.

Maren Mossman & P. Engels, “Observation of hypersonic flow dynamics with Bose-Einstein condensates,” talk at the 51st Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 4, 2020.

Q. Guan, T. M. Bersano, S. Mossman, P. Engels & D. Blume, “Rabi oscillations and Ramsey-type pulses in ultracold bosons: Role of interactions,” poster presented by Q. Guan at the 51st Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 2, 2020.

Garyfallia Katsimiga, Simeon Mistakidis, Thomas Bersano, Md Kamrul Hoque Ome, Sean Mossman, Koushik Mukherjee, Peter Schmelcher, Peter Engels & Panayotis Kevrekidis, “Observation of Multiple Dark Antidark Solitons in Two-Component Bose Einstein Condensates,” poster presented by G. Katsimiga at the 51st Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 2, 2020.

M. K. H. Ome, T. Bersano, S. Mossman, P. Engels, Q. Guan & D. Blume, “Interaction driven dynamics of a Bose-Einstein condensate in an optical lattice,” talk at the 51st Annual Meeting of the Division of Atomic, Molecular, and Optical Physics, Virtual Conference, June 2, 2020.

Maren Mossman, “Quantum Technologies at WSU: A cold atom unidirectional spin-switch device,” invited talk at the Northwest Quantum Nexus workshop for Quantum Computing, Sensing and Simulation with Cold Atoms, Washington State University, Pullman, WA Feb 21, 2020.

Sean Mossman, “Synthetic Spin-Orbit Coupling for Quantum Simulation in BECs,” invited talk at the Northwest Quantum Nexus workshop for Quantum Computing, Sensing and Simulation with Cold Atoms, Washington State University, Pullman, WA Feb 20, 2020.

M. K. H. Ome, Sean Mossman, Thomas Bersano, Maren Mossman and Peter Engels, “Fundamental quantum science and novel device concepts: Experiments with Bose-Einstein condensates and optically engineered dispersions”, poster presented by M. K. H. Ome at the Northwest Quantum Nexus workshop for Quantum Computing, Sensing and Simulation with Cold Atoms, Washington State University, Pullman, WA Feb 20-21, 2020.

**2019**

Thomas Bersano, Md Kamrul Hoque Ome, Sean Mossman, and Peter Engels, “Experimental realizations of stripe phases and Zeeman lattices

in spin-orbit coupled Bose-Einstein condensates”, presented by Peter Engels at the BEC 2019 Conference, Sant Feliu, Spain, September 9, 2019. (Poster)

Sean Mossman, Thomas Bersano and Peter Engels, “A Bose-Einstein condensate in a lattice produced by simultaneous Raman and RF coupling,” presented at the 50th Annual Meetings of the APS Division of Atomic, Molecular, and Optical Physics, Milwaukee, WI, May 30, 2019. (Talk)

Thomas Bersano, Sean Mossman, Peter Engels, Qingze Guan and Doerte Blume, “Observation of interparticle interaction effects in a Bose-Einstein condensate confined in a 1D optical lattice,” presented at the 50th Annual Meetings of the APS Division of Atomic, Molecular, and Optical Physics, Milwaukee, WI, May 30, 2019. (Talk)

Maren Mossman and Peter Engels, “Optically induced hydrodynamics in a spin-orbit-coupled Bose-Einstein condensate,” presented at the 50th Annual Meetings of the APS Division of Atomic, Molecular, and Optical Physics, Milwaukee, WI, May 29, 2019. (Talk)

Maren Mossman, Roman Chapurin, Xin Xie, M. Van de Graaf, Jun Ye, Jose D’Incao, Peter Engels & Eric Cornell, “Optimized parameter regimes for the investigation of Efimov studies on CAL,” presented at the NASA Fundamental Physics and Quantum Information Workshop, Washington DC, April 9, 2019. (Poster)

Thomas Bersano and Peter Engels, “Realization of a supersolid-like state in a Bose-Einstein condensate,” presented at the WSU GPSA Research Expo and Showcase, Pullman, WA, March 28, 2019. (Poster Competition)

Maren Mossman and Peter Engels, “Experimental demonstration of a unidirectional spin switch in a spintronic device,” presented at the WSU GPSA Research Expo and Showcase, Pullman, WA, March 28, 2019. (Poster Competition)

Peter Engels and Brian T. Saam, “Quantum expertise at WSU: Experiment” presented at the 2019 Northwest Quantum Nexus Summit, University of Washington, Seattle, March 18-19, 2019. (Poster)

Sean Mossman, Thomas Bersano, Maren Mossman and Peter Engels, “Fundamental quantum science and novel device concepts: Experiments with Bose-Einstein condensates and optically engineered dispersions” presented at the 2019 Northwest Quantum Nexus Summit, University of Washington, Seattle, March 18-19, 2019. (Poster)

Thomas Bersano, “Supersolidity: Generating a Novel Quantum State with Ultracold Atoms” presentation for the WSU College of Arts and Sciences 3 Minute Thesis competition, Pullman, WA, March 5, 2019. (Talk Competition)

**2018**

Sean Mossman, Thomas Bersano, Vandna Gokhroo and Peter Engels, “Experimental realization of a supersolid-like stripe-phase in a spin-orbit-coupled Bose-Einstein condensate enabled by momentum-space hopping,” presented by S. Mossman at the 26th International Conference of Atomic Physics and summer school, Barcelona, Spain, July 26, 2018. (Poster)

M. E. Mossman and P. Engels, “Excitation dynamics and dispersive shocks in spin-orbit coupled BECs,” presented by P. Engels at the 26th International Conference of Atomic Physics, Barcelona, Spain, July 24, 2018. (Poster)

Vandna Gokhroo, Thomas Bersano, Sean Mossman and P. Engels, “Lattice assisted coupling in a spin-orbit coupled Bose-Einstein condensate: a pathway to generating stripe-phase-like features”, presented at the 19th Annual Meeting of the APS Northwest Section, Tacoma, WA, June 2, 2018. (Talk)

Sean Mossman, Thomas Bersano and P. Engels, “A tunneling assisted, spin-orbit coupled Bose-Einstein condensate exhibiting stripe-phase-like behavior”, presented at the 49th Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, Fort Lauderdale, FL, May 31, 2018. (Talk)

Maren Mossman and P. Engels, “Dynamics of a spin-orbit coupled Bose-Einstein condensate in the presence of a moving barrier”, presented at the 49th Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, Fort Lauderdale, FL, May 31, 2018. (Talk)

Thomas Bersano, Vandna Gohkroo and P. Engels, “Experimental investigation of three-component solitons in F=1 Bose-Einstein condensates”, presented at the 49th Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, Fort Lauderdale, FL, May 30, 2018. (Talk)

Maren Mossman, Mark Hoefer and Peter Engels, *Turbulence induced viscous dissipation in a quantum mechanical piston shock*, presented at the Coherent Control of Complex Quantum Systems workshop, Okinawa, Japan, April 18, 2018. (Poster)

Maren Mossman, Peter Engels, Jose D’Incao and Eric Cornell, *Quantum Droplets in Microgravity*, presented at the NASA Fundamental Physics Workshop, La Jolla, CA, April 10, 2018. (Poster)

Maren Mossman & Peter Engels, *The Quantum Mechanical Piston Shock: Superfluidity and Turbulence in Ultracold Gases,* presented at the WSU Academic Showcase, Pullman, WA, Mar 29, 2018. (Poster)

Maren E. Mossman, *Using Ultracold Atoms to Model Quantum Mechanics*, presented at the WSU College of Arts & Sciences 3 Minute Thesis competition, Pullman, WA, Mar 20, 2018. (Talk Competition)

**2017**

Maren E. Mossman, Peter Engels, Jose D’Incao, & Eric Cornel, *Microgravity Studies of Few-Body Physics*, presented at the 33rd Annual Meeting of the ASGSR, Seattle, WA, Oct 27, 2017. (Talk)

Thomas M. Bersano, Sean Mossman, Vandna Gokhroo & Peter Engels, *Supersolid-like States in a Spin-Orbit Coupled Bose-Einstein Condensate*, presented at the Okinawa School CQD, OIST, Okinawa, Japan, Sept 28, 2017. (Poster)

Thomas M. Bersano, Sean Mossman, Vandna Gokhroo & Peter Engels, *Supersolid-like States in a Spin-Orbit Coupled Bose-Einstein Condensate*, presented by Peter Engels at the conference “Bose-Einstein condensation 2017: Frontier in quantum gases”, Sant Feliu de Guixols, Spain, September 2 – 8, 2017. (Poster)

Maren Mossman, Mark Hoefer, Keith Julien, P. G. Kevrekidis, & Peter Engels, *Dissipative hydrodynamics in a quantum-fluid piston shock,* presented at the 48th Annual DAMOP Meeting, Sacramento, CA, 8 June 2017. (To view abstract, click here) (Talk)

Vandna Gokhroo, Thomas Bersano, M. A. Khamehchi, & Peter Engels, *Dynamics of a spin-orbit coupled BEC in a matching lattice*, presented at the 48th Annual DAMOP Meeting, Sacramento, CA, 8 June 2017. (To view abstract, click here) (Talk)

Khalid Hossein, M. A. Khamehchi, M. E. Mossman, Yongping Zhang, Th. Busch, Michael Forbes, & Peter Engels, *Negative-mass hydrodynamics in a spin-orbit coupled Bose-Einstein condensate,* presented by Khalid Hossein at the 48th Annual DAMOP Meeting, Sacramento, CA, 8 June 2017. (To view abstract, click here) (Talk)

Vandna Gokhroo, Thomas Bersano, M. A. Khamehchi, & Peter Engels, *Multicomponent solitons in dilute-gas BECs*, presented at the 48th Annual DAMOP Meeting, Sacramento, CA, 7 June 2017. (To view abstract, click here) (Poster)

Chunde Huang, Vandna Gokhroo, & Peter Engels, *Arbitrary Dipole Potentials with Controllable Intensity and Phase,* presented at the 18th Annual Meeting of the APS Northwest Section, Forest Grove, OR, 2 June 2017. (To view abstract, click here) (Talk)

Thomas Bersano, Vandna Gokhroo, & Peter Engels, *Supersolid-like states in a spin-orbit-coupled Bose-Einstein condensate*, presented at the 18th Annual Meeting of the APS Northwest Section, Forest Grove, OR, 2 June 2017. (To view abstract, click here) (Talk)

Maren Mossman, Jose D’Incao, Peter Engels, Deborah Jin, & Eric Cornell, *Modelling Few-Body Physics in Microgravity,* presented at the NASA Fundamental Physics Workshop, Santa Barbara, CA, 1 June 2017. (Poster)

Maren Mossman, Jose D’Incao, Peter Engels, Deborah Jin, & Eric Cornell, *Efimov studies of an ultracold cloud of K-39 atoms in microgravity: Numerical modelling and experimental design*, presented at the 2017 Academic Showcase, Pullman, WA, 31 March 2017. (To view abstract, go to page 65 of the Abstract Booklet) (Poster)

**2016**

Maren Mossman, Peter Engels, Jose D’Incao, Deborah Jin, & Eric Cornell, *Efimov studies of an ultracold cloud of K-39 atoms in microgravity: Numerical modelling and experimental design*, presented by Peter Engels at the 47th Annual DAMOP Meeting, Providence, RI, 25 May 2016. (To view abstract, click here) (Poster)

M. A. Khamehchi, M. E. Mossman, & Peter Engels, *Spin-orbit coupled lattice band pseudospins*, presentation given at the 47th Annual DAMOP Meeting, Providence, RI, 24 May 2016. (To view abstract, click here) (Talk)

Peter Engels, M. A. Khamehchi, Chunlei Qu, Maren Mossman, & Chuanwei Zhang, *Spin-orbit coupled Bose-Einstein condensates with lattice-band pseudospins*, presented at the 17th Annual Meeting of the APS Northwest section, Penticton, BC Canada, 14 May 2016. (To view abstract, click here) (Talk)

Chunde Huang, Vandna Gokhroo, & Peter Engels, *Optical dipole potentials using a digital micromirror device*, presented at the 17th Annual Meeting of the APS Northwest section, Penticton, BC Canada, 13 May 2016. (To view abstract, click here) (Poster)

Maren Mossman, Peter Engels, Jose D’Incao, Deborah Jin, & Eric Cornell, *Investigation of few-body physics with NASA’s CAL: A precision measurement of Efimov physics in microgravity*, presented at the NASA Fundamental Physics Workshop, 12 April 2016. (Poster)

Justin Niedermeyer & Peter Engels, *Saturation Absorption Spectroscopy and Characterization of a Magneto-Optical Trap for Rubidium-87*, presented at WSU Undergraduate Education SURCA 2016, 28 March 2016. (Poster)

M. Amin Khamehchi, *Anisotropic expansion dynamics of Bose-Einstein condensates with spin-orbit coupling*, presented at WSU 2016 GPSA Research Exposition, 25 March 2016. (To view abstract, click here – abstract is on page 25 [or 187 in the pdf]) (Poster)

**2015**

M. A. Khamehchi, Maren Mossman, & Peter Engels, *Bragg Spectroscopy of spin-orbit coupled BEC*, presented at the 46th Annual DAMOP Meeting, Columbus, Ohio, 10 June 2015. (Talk)

Maren E. Mossman, M.A. Khamehchi, & Peter Engels, *Excitation spectrum of Bose-Einstein condensates with modified dispersion*, presented at the 46th Annual DAMOP Meeting, Columbus, Ohio, 10 June 2015. (Poster)

Maren E. Mossman, M. A. Khamehchi, & Peter Engels, *Engineering Dispersion Relations: Floquet-Bloch States in a Bose-Einstein condensate*, presented at the 16th Annual Meeting of the Northwest Section of the APS, Washington State University, Pullman, WA, 15 May 2015. (Talk)

M. A. Khamehchi, M. E. Mossman, & Peter Engels, *Roton minimum-like excitations in a Bose-Einstein condensate*, presented at the 16th Annual Meeting of the Northwest Section of the APS, Washington State University, Pullman, WA, 15 May 2015. (Talk)

M. A. Khamehchi, Maren E. Mossman, & Peter Engels, *Measurement of Collective Excitations in a spin-orbit coupled Bose-Einstein condensate*, presented at WSU Showcase 2015, Washington State University, Pullman, WA, 27 March, 2015. (Poster)

**2013**

P. Engels, *Quantum quenches and spin dynamics in spin-orbit coupled Bose-Einstein condensates*, presented at the conference Bose-Einstein Condensation 2013 – Frontiers in Quantum Gases, Sant Feliu de Guixols, Spain, September 7-13, 2013. (Poster)

P. Engels and C. Hamner, *Quantum quenches and spin dynamics in spin-orbit coupled Bose-Einstein condensates*, presentation at DAMOP 2013, Quebec City, Canada, June 3-7, 2013. (Talk)

C. Hamner and P. Engels, *Experimental investigation of dynamics in spin-orbit coupled BECs*, presented at DAMOP 2013, Quebec City, Canada, June 3-7, 2013. (Poster)

C. Hamner, P. Engels, C. Qu, M. Gong, and C. Zhang, *Non-equilibrium spin dynamics in spin-orbit coupled BECs*, presented at the Symposium on Novel Topological Quantum Matter, UT Dallas, February 25-26, 2013. (Poster)

**2012**

C. Hamner, J.J. Chang, and P. Engels, *Spin orbit coupling in a dilute gas Bose-Einstein condensate*, presented at the 14th Annual Meeting of the Northwest Section of the APS, Vancouver, BC, Canada, October 18-20, 2012. (Talk)

J.J. Chang, C. Hamner, and P. Engels, *On the dynamics of dark-bright and dark-dark solitons in two-component BECs*, presented at DAMOP 2012, Orange County, California, June 4-8, 2012. (Talk)

P. Engels, C. Hamner, and J.J. Chang, *Towards the observation of a Dicke type phase transition in spin-orbit coupled BECs*, presentation at DAMOP 2012, Orange County, California, June 4-8, 2012. (Talk)

C. Hamner, J. J. Chang, and P. Engels, *Nonlinear dynamics and solitonic structures of two-component BECs*, presented at DAMOP 2012, Orange County, California, June 4-8, 2012. (Poster)

**2011**

J.J. Chang, C. Hamner, and P. Engels, *Exploring novel solitonic structures in two-component BECs*, presented at DAMOP 2011, Atlanta, Georgia, June 13-17, 2011. (Poster)

P. Engels, J.J. Chang, and C. Hamner, *Harnessing modulational instability for the generation of vector solitons*, presented at DAMOP 2011, Atlanta, Georgia, June 13-17, 2011. (Poster)

**2010**

P. Engels, C. Hamner, and J.J. Chang, *Nonlinear hydrodynamics in single-component and binary Bose-Einstein condensates*, presented at 12th Annual Meeting of the Northwest Section of the APS, Walla Walla, Washington, October 1-2, 2010. (Talk)

J.J. Chang, C. Hamner, and P. Engels, *Intercomponent dispersive shock in counterflowing BECs*, presented at 12th Annual Meeting of the Northwest Section of the APS, Walla Walla, Washington, October 1-2, 2010. (Talk)

C. Hamner, J.J. Chang, and P. Engels, *Counterflow induced modulational instability in miscible, two-component BECs*, presented at 12th Annual Meeting of the Northwest Section of the APS, Walla Walla, Washington, October 1-2, 2010. (Talk)

P. Engels, J.J. Chang, and C. Hamner, *Quantum hydrodynamics of binary BECs*, presented at DAMOP 2010, Houston, Texas, May 25-29, 2010. (Talk)

J.J. Chang, C. Hamner, and P. Engels, *Nonlinear dynamics in the mixing and demixing of a twocomponent BEC*, presented at DAMOP 2010, Houston, Texas, May 25-29, 2010. (Poster)

C. Hamner, J.J. Chang, and P. Engels, *Phase winding a BEC into a soliton train*, presented at DAMOP 2010, Houston, Texas, May 25-29, 2010. (Poster)

**2009**

P. Engels,* Formation of solitons during the BEC phase transition*, presented at Bose-Einstein Condensation 2009 Frontiers in Quantum Gases, Sant Feliu de Guixols, Spain, September 5-11, 2009. (Poster)

J.J. Chang, Chris Hamner, and Peter Engels, *Formation of Solitons During the BEC Phase Transition*, presented at DAMOP 2009, Charlottesville, Virginia, May 19-23, 2009. (Poster)

**2008**

J.J. Chang and Peter Engels,* Quantum shock and soliton dynamics in the splitting and merging of BECs*, presented at DAMOP 2008, State College, Pennsylvania, May 27-31, 2008. (Poster)

**2007**

Peter Engels and C. Atherton, *Observation of Faraday Waves in a Bose-Einstein Condensate*, presented at DAMOP 2007, Calgary, Canada, June 5-9, 2007. (Talk)

P. Engels and C. Atherton,* Observation of stationary and non-stationary flow past an obstacle in a Bose-Einstein condensate*, presentation at DAMOP 2007, Calgary, Canada, June 5-9, 2007. (Poster)

P. Engels and C. Atherton, *Observation of Faraday Waves in a Dilute-Gas Bose-Einstein Condensate*, presented at the 2007 APS March Meeting, Session W32, Denver, CO, March 5-9, 2007. (Talk)

**2005**

P. Engels, presentation on current status of work at the “Workshop on Quantum analog simulations of quantum condensed-matter models”, Arlington, VA, April 4, 2005. (Talk)

**2004 and earlier**

S.-K. Tung, I. Coddington, P. Engels, V. Schweikhard, & E. A. Cornell, *Vortex Dynamics in and around the Lowest Landau Level*, DAMOP 2004, Tucson, Arizona, May 25-29, 2004.

P. Engels, I. Coddington, V. Schweikhard, & E. A. Cornell: *Experimental investigation of Vortex Lattice Dynamics in a Dilute-gas Bose-Einstein Condensate*, QFS 2003 – Quantum Fluids and Solids, Albuquerque, New Mexico, USA, August 3 – 8, 2003.

P. Engels, I. Coddington, P. C. Haljan, & E. A. Cornell, *Nonequilibrium effects in large vortex lattices*, 7th Workshop on Atom Optics and Atom Interferometry, Lunteren, Netherlands, September 28 – October 2, 2002.

P. Engels, I. Coddington, P. C. Haljan, & E. A. Cornell, *Vortex lattice dynamics in a rotating Bose-Einstein condensate*, ICAP 2002 (Eighteenth International Conference on Atomic Physics), Cambridge, Massachusetts, USA, July 28 – August 2, 2002.

P. Engels, I. Coddington, P. C. Haljan, & E. A. Cornell, *Driving BEC vorticity with a rotating normal cloud*, Euresco-conference “Bose-Einstein Condensation / EuroConference on the Physics of Atomic Gases at Low Temperatures”, Sant Feliu, Spain, September 15-20, 2001.

P. Engels, W. Ertmer, & K. Sengstock, *Magnetic guiding of a cold metastable Neon* beam*, 6th Workshop on Atom Optics and Atom Interferometry, Cargese, France, July 25-28, 2000.

P. Engels, W. Ertmer, & K. Sengstock, *Atom lithography with cold metastable Ne* atoms*, CLEO/QELS 2000, San Francisco, USA, May 7-12, 2000.

P. Engels, W. Ertmer, & K. Sengstock, *Kohaerente Atomstrahlstrukturierung in stehenden Lichtfeldern (coherent atomic beam structuring in standing light fields)*, 64. Physikertagung der DPG, Bonn, Germany, April 3-7, 2000.

P. Engels, S. Salewski, K. Sengstock, & W. Ertmer, *Atom lithography with cold metastable neon atoms*, 1999 OSA Annual Meeting and ILS-XV, Santa Clara, USA, September 26-30, 1999.

P. Engels, S. Salewski, K. Sengstock, & W. Ertmer, *Patterning surfaces with a slow metastable Ne* beam*, 43rd EIPBN’99, Marco Island, USA, June 1-4, 1999.

P. Engels, S. Salewski, K. Sengstock, & W. Ertmer, *Atomlithographie mit metastabilen Neonatomen (atom lithography with metastable neon atoms)*, 63. Physikertagung der DPG, Heidelberg, Germany, March 15-19, 1999.

A. Callegari, H. K. Srivastava, P. Engels, U. Merker, S. Choi, K. K. Lehmann, & G. Scoles, *Regular vs. chaotic intramolecular dynamics in the first CH stretching overtone of aromatic molecules*, 53rd International Symposium on Molecular Spectroscopy at Ohio State University, USA, June 15-19, 1998.

G. Pietraperzia, P. Engels, A. Callegari, H. K. Srivastava, K. K. Lehmann, & G. Scoles, *Eigenstate resolved infrared spectrum of the CH stretching first overtone region of s-tetrazine*, 52nd International Symposium on Molecular Spectroscopy at Ohio State University, USA, June 16-20, 1997.

S. Choi, A. Callegari, H. K. Srivastava, P. Engels, K. K. Lehmann, & G. Scoles, *Eigenstate resolved infrared spectroscopy of pyrrole in the C-H stretch overtone region*, 52nd International Syhmposium on Molecular Spectroscopy at Ohio State University, USA, June 16-20, 1997.

A. Callegari, H. K. Srivastava, P. Engels, K. K. Lehmann, & G. Scoles, A. Heyl and P. Botschwina,* High resolution molecular beam spectroscopy of the HCN dimer in the 1.5 m region. Reinvestigation of the 1 + 2 band and comparison with theory*, 52nd International Symposium on Molecular Spectroscopy at Ohio State University, USA, June 16-20, 1997.

A. Callegari, H. K. Srivastava, P. Engels, K. K. Lehmann, & G. Scoles, *Eigenstate resolved double resonance study of benzene intramolecular vibrational energy redistribution in the C-H stretch first overtone region: a good candidate for a successful tier model analysis*, 52nd International Symposium on Molecular Spectroscopy at Ohio State University, USA, June 16-20, 1997.