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首页> 外文期刊>Journal of physics, A. Mathematical and theoretical >Stability and pre-thermalization in chains of classical kicked rotors
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Stability and pre-thermalization in chains of classical kicked rotors

机译:古典踢转子链中的稳定性和预热

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摘要

Periodic drives are a common tool to control physical systems, but have a limited applicability because time-dependent drives generically lead to heating. How to prevent the heating is a fundamental question with important practical implications. We address this question by analyzing a chain of coupled kicked rotors, and find two situations in which the heating rate can be arbitrarily small: (i) linear stability, for initial conditions close to a fixed point, and (ii) marginal localization, for drives with large frequencies and small amplitudes. In both cases, we find that the dynamics shows universal scaling laws that allow us to distinguish localized, diffusive, and sub-diffusive regimes. The marginally localized phase has common traits with recently discovered pre-ihennalized phases of many-body quantum-Hamiltonian systems, but does not require quantum coherence.
机译:定期驱动器是控制物理系统的常用工具,但具有有限的适用性,因为时间依赖的驱动器通常导致加热。 如何防止加热是一个重要的实际意义的基本问题。 我们通过分析耦合的踢转子链来解决这个问题,并找到两个情况,其中加热速率可以是任意的:(i)线性稳定性,用于接近固定点的初始条件,以及(ii)边际定位,用于 带有大频率和小振幅的驱动器。 在这两种情况下,我们发现动态显示了通用扩展法,使我们能够区分局部,扩散和分散制度。 边缘局部化阶段具有常见的特征,最近发现了许多身体量子 - 哈密顿系统的Ihennalizy阶段,但不需要量子相干。

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