期刊
PHYSICAL REVIEW A
卷 87, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.87.033606
关键词
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资金
- Austrian Science Fund [SFB F40 FOQUS]
- US Army Research Office
- DARPA OLE program
- AFOSR [FA9550-12-1-0057]
- Center for Simulation and Modeling at the University of Pittsburgh
We analyze the heating of interacting bosonic atoms in an optical lattice due to intensity fluctuations of the lasers forming the lattice. We focus in particular on fluctuations at low frequencies below the band-gap frequency, such that the dynamics is restricted to the lowest band. We derive stochastic equations of motion, and analyze the effects on different many-body states, characterizing heating processes in both strongly and weakly interacting regimes. In the limit where the noise spectrum is flat at low frequencies, we can derive an effective master equation describing the dynamics. We compute heating rates and changes to characteristic correlation functions both in the perturbation theory limit and using a full time-dependent calculation of the stochastic many-body dynamics in one dimension based on time-dependent density-matrix-renormalization-group methods. DOI: 10.1103/PhysRevA.87.033606
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