Centre for Quantum Computation and Communication Technology, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Canberra ACT 2601 Australia.
Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Canberra ACT 2601 Australia.
Sci Rep. 2017 Mar 20;7:44684. doi: 10.1038/srep44684.
Environment-induced decoherence has long been recognised as being of crucial importance in the study of chaos in quantum systems. In particular, the exact form and strength of the system-environment interaction play a major role in the quantum-to-classical transition of chaotic systems. In this work we focus on the effect of varying monitoring strategies, i.e. for a given decoherence model and a fixed environmental coupling, there is still freedom on how to monitor a quantum system. We show here that there is a region between the deep quantum regime and the classical limit where the choice of the monitoring parameter allows one to control the complex behaviour of the system, leading to either the emergence or suppression of chaos. Our work shows that this is a result from the interplay between quantum interference effects induced by the nonlinear dynamics and the effectiveness of the decoherence for different measurement schemes.
环境诱导的退相干长期以来一直被认为是研究量子系统混沌的关键因素。特别是，系统与环境相互作用的确切形式和强度在混沌系统的量子到经典转变中起着重要作用。在这项工作中，我们关注监测策略的变化效果，即对于给定的退相干模型和固定的环境耦合，仍然有自由度来监测量子系统。我们在这里表明，在深量子区域和经典极限之间存在一个区域，在这个区域中，监测参数的选择可以控制系统的复杂行为，导致混沌的出现或抑制。我们的工作表明，这是由非线性动力学引起的量子干涉效应与不同测量方案的退相干效果之间的相互作用所导致的。
