论文标题
通过拓扑链快速，稳健的量子状态转移
Fast and robust quantum state transfer via a topological chain
论文作者
论文摘要
我们提出了一种使用Su-Schrieffer-Heeger链的快速且稳健的量子传输协议，该链的时间链耦合随时间变化。基于围绕绝热不变定义涉及的术语的简单考虑，我们构建了指数式的时间驾驶功能，该功能成功地利用了共鸣效应来加快转移过程。使用最佳控制理论，我们确认所提出的时间驾驶函数接近最佳。为了揭示我们建筑的关键方面，我们与其他两个协议进行了比较。一个基础的Su-Schrieffer-Heeger链是绝热的时间驱动，而另一个基础链在拓扑上是微不足道的，并且正在起作用。通过数值研究每个方案对静态噪声的弹性，我们强调了指数驾驶的鲁棒性。
We propose a fast and robust quantum state transfer protocol employing a Su-Schrieffer-Heeger chain, where the interchain couplings vary in time. Based on simple considerations around the terms involved in the definition of the adiabatic invariant, we construct an exponential time-driving function that successfully takes advantage of resonant effects to speed up the transfer process. Using optimal control theory, we confirm that the proposed time-driving function is close to optimal. To unravel the crucial aspects of our construction, we proceed to a comparison with two other protocols. One where the underlying Su-Schrieffer-Heeger chain is adiabatically time-driven and another where the underlying chain is topologically trivial and resonant effects are at work. By numerically investigating the resilience of each protocol to static noise, we highlight the robustness of the exponential driving.
