Sudden death of entanglement and teleportation fidelity loss via the Unruh effect
Sudden death of entanglement and teleportation fidelity loss via the Unruh effect
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DOI：
10.1103/physreva.80.032315
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发表时间：
2009-09-01
影响因子：
2.9
通讯作者：
Matsas, George E. A.
中科院分区：
文献类型：
--
作者：
Landulfo, Andre G. S.;Matsas, George E. A.
我们使用Unruh效应来研究当过程中使用的纠缠量子比特之一受到某些外力的影响时，量子态的隐形传态是如何受到影响的。为了得到全面的认识，本文对这种纠缠量子比特系统的加速效应进行了详细的分析。特别是，我们计算了两个量子比特之间的互信息和并发性，并表明后者在有限加速下具有“猝死”，其值将取决于探测器加速的时间间隔。
We use the Unruh effect to investigate how the teleportation of quantum states is affected when one of the entangled qubits used in the process is under the influence of some external force. In order to reach a comprehensive understanding, a detailed analysis of the acceleration effect on such entangled qubit system is performed. In particular, we calculate the mutual information and concurrence between the two qubits and show that the latter has a "sudden death" at a finite acceleration, whose value will depend on the time interval along which the detector is accelerated.