Creation of entanglement by interaction with a common heat bath
Creation of entanglement by interaction with a common heat bath
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DOI：
10.1103/physrevlett.89.277901
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发表时间：
2002-12-30
影响因子：
8.6
通讯作者：
Braun, D
中科院分区：
文献类型：
--
作者：
Braun, D
我表明，如果两个量子比特与一个处于热平衡的公共热浴相互作用，但不直接相互作用，则可以产生两个量子比特之间的纠缠。在大多数情况下，在开启与热浴的相互作用后，纠缠会在很短的时间内产生，但根据系统、耦合和热浴，纠缠可能会持续任意长的时间。这种机制为纠缠的产生提供了新的线索。讨论了一个特殊的例子，两个量子点在一个封闭的腔，其中的热浴是由黑体辐射。
I show that entanglement between two qubits can be generated if the two qubits interact with a common heat bath in thermal equilibrium, but do not interact directly with each other. In most situations the entanglement is created for a very short time after the interaction with the heat bath is switched on, but depending on system, coupling, and heat bath, the entanglement may persist for arbitrarily long times. This mechanism sheds new light on the creation of entanglement. A particular example of two quantum dots in a closed cavity is discussed, where the heat bath is given by the blackbody radiation.