论文标题
绑定的纠缠洛伦兹不变吗？
Is bound entanglement Lorentz invariant?
论文作者
论文摘要
与自由纠缠相比，约束的纠缠无法通过应用测量并利用经典交流的两名当地观察者将其提炼成最大的纠缠状态。在本文中，我们询问相对论观察者是否根据可分离，约束或自由纠缠的状态与未提升的观察者进行分类。令人惊讶的是，事实并非如此。而且，即使在给定的惯性参考框架中的系统相对于分区动量与旋转也可以分离。详细说明，我们表明，如果自旋状态最初是绑定的，则一些提升的观察者会观察其旋转状态是被绑定的纠缠，可分离或自由纠缠的。这也解释了为什么很难找到纠缠财产的一般度量。
Bound entanglement, in contrast to free entanglement, cannot be distilled into maximally entangled states by two local observers applying measurements and utilizing classical communication. In this paper we ask whether a relativistic observer classifies states according to being separable, bound or free entangled in the same manner as an unboosted observer. Surprisingly, this turns out not to be the case. And that even if the system in a given inertial frame of reference is separable with respect to the partition momenta versus spins. In detail, we show that if the spin state is initially bound entangled, some boosted observers observe their spin states to be either bound entangled, separable or free entangled. This also explains why a general measure of the entanglement property is difficult to find.
