Centre for Quantum Computer Technology, Department of Physics, The University of Queensland, Brisbane 4072 Australia.
Phys Rev Lett. 2011 May 27;106(21):210502. doi: 10.1103/PhysRevLett.106.210502. Epub 2011 May 25.
An open question in the field of relativistic quantum information is how parties in arbitrary motion may distribute and store quantum entanglement. We propose a scheme for storing quantum information in the field modes of cavities moving in flat space-time and analyze it in a quantum field theoretical framework. In contrast with previous work that found entanglement degradation between observers moving with uniform acceleration, we find the quantum information in such systems is protected. We further discuss a method for establishing the entanglement in the first place and show that in principle it is always possible to produce maximally entangled states between the cavities.
在相对论量子信息领域有一个悬而未决的问题，即处于任意运动状态的各方如何分配和存储量子纠缠。我们提出了一种在平坦时空中运动的腔场模式中存储量子信息的方案，并在量子场论框架下对其进行了分析。与之前发现观察者在匀加速运动时会发生纠缠退化的工作不同，我们发现此类系统中的量子信息是受到保护的。我们进一步讨论了首先建立纠缠的方法，并表明原则上总是有可能在腔之间产生最大纠缠态。
