Centre for Engineered Quantum Systems, School of Mathematics and Physics, University of Queensland, St Lucia, Queensland 4072, Australia.
Philos Trans A Math Phys Eng Sci. 2012 Sep 28;370(1975):4469-86. doi: 10.1098/rsta.2011.0487.
We find the conditions for one quantum system to function as a classical controller of another quantum system: the controller must be an open system and rapidly diagonalized in the diagonal basis of the controller variable that is coupled to the controlled system. This causes decoherence in the controlled system that can be made small if the rate of diagonalization is fast. We give a detailed example based on the quantum optomechanical control of a mechanical resonator. The resulting equations are structurally similar to recently proposed models for consistently combining quantum and classical stochastic dynamics.
控制器必须是一个开放系统，并且在与受控系统耦合的控制器变量的对角基中快速对角化。这会导致受控系统的退相干，如果对角化的速度很快，那么退相干可以很小。我们给出了一个基于机械谐振器的量子光学控制的详细示例。所得到的方程在结构上类似于最近提出的用于一致组合量子和经典随机动力学的模型。
