Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session B28: Quantum Gases in Optical Lattices
11:30 AM–2:30 PM,
Monday, March 15, 2021
Sponsoring Unit: DAMOP
Chair: Han Pu, Rice Univ
Abstract: B28.00013 : Semiclassical analysis of frustrated Bose gases in optical kagome lattices
1:54 PM–2:06 PM
In this talk, we consider spinless bosons with sign-inverted hopping on the kagome lattice within the regime of weak quantum fluctuations. Since the single particle energies are degenerate in the flat band, the interaction plays a dominant role in determining various properties of the kagome-lattice system. In addition, the previous work  suggested that quantum fluctuations resolve the degeneracy and there exist three different phases depending on the temperature. Here we focus on a weak-interaction and high-density regime where quantum fluctuations are weak. We investigate whether these quantum states can be realized and identified in ultracold-gas experiments by calculating non-equilibrium dynamics within the truncated Wigner approximation.
 H. Diep, Frustrated Spin Systems (World Scientific, Singapore, 2004).
 Y.-Z. You, Z. Chen, X.-Q. Sun, and H. Zhai, Physical Review Letters 109, 265302 (2012).
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