论文标题
耦合的两级系统中的量子与经典能量运输
Quantum versus classical transport of energy in coupled two-level systems
论文作者
论文摘要
我们考虑了耦合量子系统链中的能量传输问题，目的是阐明非古典资源如何影响运输。我们研究链中相干或不连贯的能量跳跃的案例。在这里，不一致的能量跳跃被称为对其完全对角线动力学的“经典”情景，这是由解耦地点的特征状态形成的基础。我们专注于两级位点的线性链的情况，并找到一个跳高率阈值，在该阈值之上，相干量子案例比不连贯的量子更有效。然后，我们将量子跳率链接到连贯的全局最大值，这使我们能够声明存在一个连贯的阈值，量子场景更有效。接下来，我们考虑动力学产生的集成相干性，并显示其与量子操作的侵入性相关。我们的结果强烈表明，量子侵入性作为量子运输的资源起着重要作用。
We consider the problem of energy transport in a chain of coupled quantum systems with the goal of shedding light on how nonclassical resources can affect transport. We study the cases for which either coherent or incoherent energy hopping takes place in the chain. Here, incoherent energy hopping is referred to as the "classical" scenario in allusion to its fully diagonal dynamics in the basis formed by the eigenstates of the decoupled sites. We focus on the case of a linear chain of two-level sites and find a hopping rate threshold above which the coherent quantum case is more efficient than the incoherent counterpart. We then link the quantum hopping rate to the coherence global maximum, which allows us to state that there is a coherence threshold above which the quantum scenario is more efficient. Next, we consider the integrated coherence generated by the dynamics and show how it is related to what is known as the invasiveness of a quantum operation. Our results strongly suggest the significant role played by quantum invasiveness as a resource for quantum transport.
