Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Finite-momentum superfluid phases of ultracold bosons in optical lattices

Not scheduled
1h 30m
Abstract of recent or ongoing work (by remote / virtual participant) Degenerate gases, many-body physics, and quantum simulation Abstracts by remote participants


The ultracold atoms are an excellent platform to simulate complex quantum many-body systems of condensed-matter physics. We discuss the quantum phases of a two-dimensional spin-orbit coupled bosons in an optical lattice. This system breaks the rotational symmetry in momentum-space and the condensation occurs at finite momentum. The interplay of single-particle hopping, strength of spin-orbit coupling, and interspin interaction results into finite-momentum superfluidity. At low hopping strengths, the insulating phases are destroyed and phase-twisted superfluid emerges. We further identify a phase-twisted to stripe superfluid transition as hopping strength increases. Finally, we show the role of thermal fluctuations on the stability of finite-momentum superfluids. Our findings are timely and pertinent to the recent progress on quantum gas experiments and pave a way to observe finite-momentum superfluid phases in optical lattices.

Presenter name Dr. Kuldeep Suthar
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Primary authors

Dr Kuldeep Suthar (Institute of Atomic and Molecular Sciences, Academia Sinica, Taiwan) Ms Pardeep Kaur (Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India) Dr Sandeep Gautam (Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India) Prof. Dilip Angom (Department of Physics, Manipur University, Canchipur 795003, Manipur, India)

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