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arXiv 1105.0686cond-mat.quant-gasquant-ph
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周期驱动量子气体的慢猝灭动力学

Slow quench dynamics of periodically driven quantum gases

Dario Poletti, Corinna Kollath

摘要:

研究了周期性驱动光晶格中玻色子在驱动振幅缓慢变化时的演化。两个政权的高频和低频驱动进行了研究。在低频区,观察到能量的共振吸收。在高频率的制度,动力学相比,一个系统中的原子是“穿着”的驱动场的有效哈密顿量。这种“修饰”可以显著地改变有效隧穿的幅度和符号。本研究的一个特别的重点是调查的时间尺度所需的演变量子态,以遵循几乎完全的有效多体系统的基态。

英文摘要:

We study the evolution of bosons in a periodically driven optical lattice during a slow change of the driving amplitude. Both the regime of high frequency and low frequency driving are investigated. In the low frequency regime, resonant absorption of energy is observed. In the high frequency regime, the dynamics is compared to a system with an effective Hamiltonian in which the atoms are `dressed' by the driving field. This `dressing' can dramatically change the amplitude and sign of the effective tunneling. A particular focus of this study is the investigation of the time-scales necessary for the evolving quantum state to follow almost adiabatically to the ground-state of the effective many body system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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