Controllable single-photon transport between remote coupled-cavity arrays
Controllable single-photon transport between remote coupled-cavity arrays
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DOI：
10.1103/physreva.93.032337
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发表时间：
2015-12
影响因子：
2.9
通讯作者：
W. Qin;F. Nori
中科院分区：
文献类型：
--
作者：
W. Qin;F. Nori
我们发展了一种新的方法来控制两个远距离的一维耦合腔阵列之间的单光子传输，作为量子寄存器，通过额外的一维耦合腔阵列作为量子通道。位于中间通道一个腔内的单个二能级原子被用来控制两个远程寄存器之间的长程相干量子耦合，从而起到量子开关的作用。通过与时间无关的微扰处理，我们发现量子信息的泄漏原则上可以任意小。此外，我们的方法可以扩展到在多寄存器量子网络中实现量子路由器，其中单光子既可以存储在一个寄存器中，也可以按需传输到另一个寄存器中。这些结果得到了数值模拟的证实。
We develop a new approach for controllable single-photon transport between two remote one-dimensional coupled-cavity arrays, used as quantum registers, mediated by an additional one-dimensional coupled-cavity array, acting as a quantum channel. A single two-level atom located inside one cavity of the intermediate channel is used to control the long-range coherent quantum coupling between two remote registers, thereby functioning as a quantum switch. With a time-independent perturbative treatment, we find that the leakage of quantum information can in principle be made arbitrarily small. Furthermore, our method can be extended to realize a quantum router in multi-register quantum networks, where single-photons can be either stored in one of the registers or transported to another on demand. These results are confirmed by numerical simulations.