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arXiv · 1512.06487

Controllable single-photon transport between remote coupled-cavity arrays

Wei Qin·Franco Nori
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Abstract

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.

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Wei Qin, Franco Nori. 2016-03-25. Controllable single-photon transport between remote coupled-cavity arrays. https://doi.org/10.1103/physreva.93.032337

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