期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.205301
关键词
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资金
- NSF [DMR-1308435]
- Harvard-MIT CUA
- AFOSR New Quantum Phases of Matter MURI
- ARO-MURI on Atomtronics
- ARO MURI Quism program
- AFOSR [FA9550-13-1-0039]
- BSF [2010318]
- Technical University Munich-Institute for Advanced Study - German Excellence Initiative
- European Union FP7 [291763]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1308435] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1125846] Funding Source: National Science Foundation
We explore prethermal Floquet steady states and instabilities of the weakly interacting two-dimensional Bose-Hubbard model subject to periodic driving. We develop a description of the nonequilibrium dynamics, at arbitrary drive strength and frequency, using a weak-coupling conserving approximation. We establish the regimes in which conventional (zero-momentum) and unconventional [(pi, pi)-momentum] condensates are stable on intermediate time scales. We find that condensate stability is enhanced by increasing the drive strength, because this decreases the bandwidth of quasiparticle excitations and thus impedes resonant absorption and heating. Our results are directly relevant to a number of current experiments with ultracold bosons.
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