Rate analysis for a hybrid quantum repeater

被引：59

作者：

Bernardes, Nadja K. ^{[1
,2
]}

Praxmeyer, Ludmila ^{[3
]}

van Loock, Peter ^{[1
,2
]}

机构：

[1] Max Planck Inst Sci Light, Opt Quantum Informat Theory Grp, D-91058 Erlangen, Germany

[2] Univ Erlangen Nurnberg, Inst Theoret Phys 1, D-91058 Erlangen, Germany

[3] Nicholas Copernicus Univ, Inst Phys, PL-87100 Torun, Poland

来源：

PHYSICAL REVIEW A | 2011年 / 83卷 / 01期

关键词：

COMMUNICATION; CRYPTOGRAPHY;

D O I：

10.1103/PhysRevA.83.012323

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a detailed rate analysis for a hybrid quantum repeater assuming perfect memories and using optimal probabilistic entanglement generation and deterministic swapping routines. The hybrid quantum repeater protocol is based on atomic qubit-entanglement distribution through optical coherent-state communication. An exact, analytical formula for the rates of entanglement generation in quantum repeaters is derived, including a study on the impacts of entanglement purification and multiplexing strategies. More specifically, we consider scenarios with as little purification as possible and we show that for sufficiently low local losses, such purifications are still more powerful than multiplexing. In a possible experimental scenario, our hybrid system can create near-maximally entangled (F = 0.98) pairs over a distance of 1280 km at rates of the order of 100 Hz.

引用

页数：13