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Long-time asymptotic state of periodically driven open quantum systems

机译:周期性驱动的开放量子系统的长期渐近状态

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摘要

We investigate a long-time asymptotic state of periodically driven open quantum systems analytically. The model we consider in this paper is a free fermionic system coupled to an energy and particle reservoir. We clarify some generic properties of the system which are independent of the details of the reservoir in the high-frequency regime of the external driving. When the frequency of the external driving is much larger than the energy cutoff of the system-reservoir coupling, the low-energy properties of the system are equivalent to those of the Gibbs distribution of a Floquet effective Hamiltonian. Furthermore, we investigate the effect of finite dissipation on the system, and elucidate that we cannot suppress excitations by merely increasing the system-reservoir coupling because the excitations are created through the reservoir by the external driving when the frequency is smaller than the energy cutoff of the system-reservoir coupling.
机译:我们分析地研究了周期性驱动的开放量子系统的长期渐近状态。我们在本文中考虑的模型是与能量和粒子储集层耦合的自由铁离子系统。我们阐明了该系统的一些通用属性,这些属性与外部驱动的高频状态下油藏的细节无关。当外部驱动的频率远大于系统-储层耦合的能量截止时,系统的低能量特性与Floquet有效哈密顿量的吉布斯分布相同。此外,我们研究了有限耗散对系统的影响,并阐明了不能仅通过增加系统-储层耦合来抑制励磁,因为当频率小于C的能量截止时,励磁是由外部驱动通过储层产生的。系统-储层耦合。

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  • 来源
    《Physical review》 |2016年第18期|184304.1-184304.6|共6页
  • 作者

    Koudai Iwahori; Norio Kawakami;

  • 作者单位

    Department of Physics, Kyoto University, Kyoto 606-8502, Japan;

    Department of Physics, Kyoto University, Kyoto 606-8502, Japan;

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  • 正文语种 eng
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