期刊
PHYSICAL REVIEW A
卷 90, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.90.013602
关键词
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资金
- DARPA OLE program
- NSF Graduate Fellowship
- National Science Foundation, Army Research Office
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205548] Funding Source: National Science Foundation
Dissipation is introduced to a strongly interacting ultracold bosonic gas in the Mott-insulator regime of a three-dimensional spin-dependent optical lattice. A weakly interacting superfluid comprised of atoms in a state that does not experience the lattice potential acts as a dissipative bath coupled to the lattice atoms via collisions. Lattice atoms are excited to a higher-energy band via Bragg transitions, and the resulting bath-induced decay is measured using the atomic quasimomentum distribution. A competing but slower intrinsic decay mechanism arising from collisions between lattice atoms is also investigated. The measured bath-induced decay rate is compared with the predictions of a weakly interacting model with no free parameters. The presence of intrinsic decay, which cannot be accommodated within this framework, signals that strong interactions may play a central role in the lattice-atom dynamics.
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