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arXiv 0910.0231quant-ph
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耗散量子混沌系统的稳定经典结构

Stable classical structures in dissipative quantum chaotic systems

Lisandro A. Raviola, Gabriel G. Carlo, Alejandro M. F. Rivas

摘要:

研究了耗散量子演化时混沌系统中经典结构的稳定性。我们考虑一个典型的模型,量子面包师映射在有限温度下与热浴接触。我们分析了纯度,保真度和Husimi分布的行为对应的初始状态定位在短周期轨道(疤痕功能)和地图本征态。疤痕功能,有一个基本的作用,在混沌系统的半经典描述,出现对环境扰动非常强大。这一点已被经典结构上的其他局域态的研究所证实。此外,纯度和保真度显示出互补的行为作为退相干措施。

英文摘要:

We study the stability of classical structures in chaotic systems when a dissipative quantum evolution takes place. We consider a paradigmatic model, the quantum baker map in contact with a heat bath at finite temperature. We analyze the behavior of the purity, fidelity and Husimi distributions corresponding to initial states localized on short periodic orbits (scar functions) and map eigenstates. Scar functions, that have a fundamental role in the semiclassical description of chaotic systems, emerge as very robust against environmental perturbations. This is confirmed by the study of other states localized on classical structures. Also, purity and fidelity show a complementary behavior as decoherence measures.

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