论文标题
当一个粒子变成经典时，多粒纠缠的命运
Fate of multiparticle entanglement when one particle becomes classical
论文作者
论文摘要
如果一个粒子变成经典，我们研究多片纠缠的变化，从某种意义上说，该粒子被测量破坏了，但是所获得的信息被编码为新寄存器。我们对不同的纠缠措施和编码方式进行了对这种变化的估计。我们首先简化了数值计算，以分析特殊情况下经典化纠缠的变化。其次，我们在纠缠变化上提供一般的上限和下限。第三，我们表明，仅由一个量子的经典化引起的纠缠变化仍然可以任意大。最后，我们讨论了任何可能的测量结果都没有纠缠不到纠缠的案例。我们的结果阐明了量子资源的存储，并有助于在量子资源理论领域发展一个新颖的方向。
We study the change of multiparticle entanglement if one particle becomes classical, in the sense that this particle is destructed by a measurement, but the gained information is encoded into a new register. We present an estimation of this change for different entanglement measures and ways of encoding. We first simplify the numerical calculation to analyze the change of entanglement under classicalization in special cases. Second, we provide general upper and lower bounds on the entanglement change. Third, we show that the entanglement change caused by classicalization of one qubit only can still be arbitrarily large. Finally, we discuss cases where no entanglement is left under classicalization for any possible measurement. Our results shed light on the storage of quantum resources and help to develop a novel direction in the field of quantum resource theories.
