期刊
PHYSICAL REVIEW A
卷 95, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.95.033603
关键词
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资金
- AFOSR [FA9550-15-1-0445]
- ARO [W911NF-16-1-0182, W911NF-12-1-0334]
- NSF [PHY-1505496]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1505496] Funding Source: National Science Foundation
At low temperatures bosons typically condense to minimize their single-particle kinetic energy while interactions stabilize superfluidity. Optical lattices with artificial spin-orbit coupling challenge this paradigm, because here kinetic energy can be quenched in an extreme regime where the single-particle band flattens. To probe the fate of superfluidity in the absence of kinetics we construct and numerically solve interaction-only tight-binding models in flatbands. We find that superfluid states arise entirely from interactions operating in quenched kinetic energy bands, thus revealing a distinct and unexpected condensation mechanism. Our results have important implications for the identification of quantum condensed phases of ultracold bosons beyond conventional paradigms.
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