Heating dynamics of bosonic atoms in a noisy optical lattice

被引：42

作者：

Pichler, Hannes ^{[1
,2
]}

Schachenmayer, Johannes ^{[1
,2
,3
]}

Daley, Andrew J. ^{[3
]}

Zoller, Peter ^{[1
,2
]}

机构：

[1] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria

[2] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria

[3] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 03期

基金：

奥地利科学基金会;

关键词：

QUANTUM PHASE-TRANSITION; SUPERFLUIDITY; INSULATOR; GAS;

D O I：

10.1103/PhysRevA.87.033606

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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

引用

页数：9

共 44 条

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