论文标题
净化传送
Purifying teleportation
论文作者
论文摘要
与环境耦合通常会通过反应机制抑制物理系统的量子特性。这是量子协议实际实施的主要障碍之一。在这项工作中，我们展示了如何在网络方案中量子传送过程中逆转/抑制的脱碳效应。量化环境的处理，我们表明，在一般的纯dephasing耦合下，执行第二个传送步骤，如果某些交通量条件的存在，则可能会扭转反折叠效应。这种效果纯粹是量子，对于量子系统来说最为明显，在25％的情况下，可以完全逆转逆转。例如，我们在量子液的物理模型中显示了效果，该模型耦合到骨浴。我们还分析了一般$ D $维系统，以确定所有抑制抑制的实例。我们的结果是概念验证的证明，但我们认为，由于传送是网络协议的关键构建块，因此与量子网络的新兴领域有关。
Coupling to the environment typically suppresses quantum properties of physical systems via decoherence mechanisms. This is one of the main obstacles in practical implementations of quantum protocols. In this work we show how decoherence effects can be reversed/suppressed during quantum teleportation in a network scenario. Treating the environment quantumly, we show that under a general pure dephasing coupling, performing a second teleportation step can probabilistically reverse the decoherence effects if certain commutativity conditions hold. This effect is purely quantum and most pronounced for qubit systems, where in 25 % of instances the decoherence can be reversed completely. As an example, we show the effect in a physical model of a qubit register coupled to a bosonic bath. We also analyze general $d$-dimensional systems, identifying all instances of decoherence suppression. Our results are proof-of-concept but we believe will be relevant for the emerging field of quantum networks as teleportation is the key building block of network protocols.
