标题： 耗散量子混沌系统中的稳定经典结构 显示英文标题

标题： Stable classical structures in dissipative quantum chaotic systems

摘要： 我们研究了当耗散的量子演化发生时，混沌系统中经典结构的稳定性。 我们考虑了一个范例模型，即与有限温度热浴接触的量子面包图。 我们分析了初始状态位于短周期轨道（疤痕函数）和映射本征态上的纯度、保真度和胡西米分布的行为。 在混沌系统的半经典描述中具有重要作用的疤痕函数，在面对环境扰动时表现出极强的鲁棒性。 通过研究其他定位于经典结构上的态，这一结论得到了验证。 此外，纯度和保真度作为退相干度量表现出互补行为。 显示英文摘要

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.