Fuentes-Schuller I, Mann R B
Centre for Quantum Computation, Clarendon Laboratory, University of Oxford, Parks Road OX1 3PU, United Kingdom.
Phys Rev Lett. 2005 Sep 16;95(12):120404. doi: 10.1103/PhysRevLett.95.120404. Epub 2005 Sep 14.
Two observers determine the entanglement between two free bosonic modes by each detecting one of the modes and observing the correlations between their measurements. We show that a state which is maximally entangled in an inertial frame becomes less entangled if the observers are relatively accelerated. This phenomenon, which is a consequence of the Unruh effect, shows that entanglement is an observer-dependent quantity in noninertial frames. In the high acceleration limit, our results can be applied to a nonaccelerated observer falling into a black hole while the accelerated one barely escapes. If the observer escapes with infinite acceleration, the state's distillable entanglement vanishes.
两位观察者通过各自检测其中一个模式并观察他们测量之间的相关性，来确定两个自由玻色子模式之间的纠缠。我们表明，如果观察者相对加速，那么在惯性系中最大纠缠的状态会变得纠缠度降低。这种作为昂鲁效应结果的现象表明，在非惯性系中纠缠是一个依赖于观察者的量。在高加速极限情况下，我们的结果可应用于一个非加速观察者落入黑洞而加速观察者勉强逃脱的情形。如果观察者以无限加速度逃脱，该状态的可提取纠缠将消失。
