qutrit-qutrit系统中可解性的突然死亡
Sudden death of distillability in qutrit-qutrit systems
摘要：
我们引入可解释性猝死的概念，即，在局域噪声的作用下，自由纠缠态可以在有限时间内演化为不可分离（束缚纠缠或可分离）态。我们描述的现象，通过一个特定的模型的本地移相噪声和比较的行为的状态的Bures保真度。在此基础上，我们提出了几种方法来避免纠缠态在（一般）局域退相噪声下的非线性突然死亡，从而使自由纠缠态对退相干具有鲁棒性。此外，我们还发现束缚纠缠态在无限长时间内是不稳定的。
英文摘要：
We introduce the concept of distillability sudden death, i.e., free entangled states can evolve into non-distillable (bound entangled or separable) states in finite time under local noise. We describe the phenomenon through a specific model of local dephasing noise and compare the behavior of states in terms of the Bures fidelity. Then we propose a few methods to avoid distillability sudden death of states under (general) local dephasing noise, so that free entangled states can be robust against decoherence. Moreover, we find that bound entangled states are unstable in the limit of infinite time.
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