论文标题
开放系统动态的噪声表示
Noise representations of open system dynamics
论文作者
论文摘要
我们分析了可以使用外部嘈杂场模拟量子系统的动力学的条件，该场外噪声场是对环境自由度的替代品。我们表明，这样的领域是主观的或客观的代理。前者只能模拟特定系统的动力学 - 环境布置，而后者是与给定环境相互作用的任何系统的通用模拟器。因此，是否存在客观替代领域，其特性是什么由环境决定的。因此，我们能够为环境制定足够的标准以促进其替代物，并确定许多满足环境的环境类型。最后，我们讨论了在什么意义上可以将客观的替代现场表示形式视为古典，并解释了它与系统形成的关系 - 环境纠缠以及系统对环境的反作用。
We analyze the conditions under which the dynamics of a quantum system open to a given environment can be simulated with an external noisy field that is a surrogate for the environmental degrees of freedom. We show that such a field is either a subjective or an objective surrogate; the former is capable of simulating the dynamics only for the specific system--environment arrangement, while the latter is an universal simulator for any system interacting with the given environment. Consequently, whether the objective surrogate field exists and what are its properties is determined exclusively by the environment. Thus, we are able to formulate the sufficient criterion for the environment to facilitate its surrogate, and we identify a number of environment types that satisfy it. Finally, we discuss in what sense the objective surrogate field representation can be considered classical and we explain its relation to the formation of system--environment entanglement, and the back-action exerted by the system onto environment.
