Sudden Transition between Classical and Quantum Decoherence
Sudden Transition between Classical and Quantum Decoherence
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DOI：
10.1103/physrevlett.104.200401
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发表时间：
2010-05-21
影响因子：
8.6
通讯作者：
Maniscalco, S.
中科院分区：
文献类型：
--
作者：
Mazzola, L.;Piilo, J.;Maniscalco, S.
我们研究了非耗散退相干条件下量子关联和经典关联的动力学。我们发现了一类初始态，对于这类初始态，由量子不和谐量化的量子关联在t<；时间内不会被退相干破坏。在这个初始时间间隔内，经典关联衰变。另一方面，对于BAR上的t>；(T)，经典关联不会随时间变化，只有量子关联会因为与环境的相互作用而丢失。因此，在杆上的跃迁时间(T)，开放系统动力学表现出从经典退相干到量子退相干的突然转变。
We study the dynamics of quantum and classical correlations in the presence of nondissipative decoherence. We discover a class of initial states for which the quantum correlations, quantified by the quantum discord, are not destroyed by decoherence for times t < . In this initial time interval classical correlations decay. For t > (t) over bar, on the other hand, classical correlations do not change in time and only quantum correlations are lost due to the interaction with the environment. Therefore, at the transition time (t) over bar the open system dynamics exhibits a sudden transition from classical to quantum decoherence regime.