具备光子对源和多模存储器的量子中继器。

Quantum repeaters with photon pair sources and multimode memories.

作者信息

Simon Christoph, de Riedmatten Hugues, Afzelius Mikael, Sangouard Nicolas, Zbinden Hugo, Gisin Nicolas

机构信息

Group of Applied Physics, University of Geneva, Switzerland.

出版信息

Phys Rev Lett. 2007 May 11;98(19):190503. doi: 10.1103/PhysRevLett.98.190503.

DOI:10.1103/PhysRevLett.98.190503

PMID:17677612

Abstract

We propose a quantum repeater protocol which builds on the well-known Duan-Lukin-Cirac-Zoller (DLCZ) protocol [L. M. Duan, M. D. Lukin, J. I. Cirac, and P. Zoller, Nature (London) 414, 413 (2001)10.1038/35106500], but which uses photon pair sources in combination with memories that allow to store a large number of temporal modes. We suggest to realize such multimode memories based on the principle of photon echo, using solids doped with rare-earth-metal ions. The use of multimode memories promises a speedup in entanglement generation by several orders of magnitude and a significant reduction in stability requirements compared to the DLCZ protocol.

摘要

我们提出了一种量子中继器协议，该协议基于著名的段-卢金-西拉克斯-佐勒（DLCZ）协议[L.M.段、M.D.卢金、J.I.西拉克斯和P.佐勒，《自然》（伦敦）414, 413（2001年）10.1038/35106500]构建，但它将光子对源与能够存储大量时间模式的存储器结合使用。我们建议基于光子回波原理，使用掺杂稀土金属离子的固体来实现这种多模式存储器。与DLCZ协议相比，使用多模式存储器有望将纠缠生成速度提高几个数量级，并显著降低稳定性要求。