Quantum repeaters based on Rydberg-blockade-coupled atomic ensembles

被引：79

作者：

Han, Yang ^{[1
,2
,3
]}

He, Bing ^{[1
,2
]}

Heshami, Khabat ^{[1
,2
]}

Li, Cheng-Zu ^{[3
]}

Simon, Christoph ^{[1
,2
]}

机构：

[1] Univ Calgary, Inst Quantum Informat Sci, Calgary, AB T2N 1N4, Canada

[2] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[3] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China

来源：

PHYSICAL REVIEW A | 2010年 / 81卷 / 05期

关键词：

NEUTRAL ATOMS; COMMUNICATION; STATE;

D O I：

10.1103/PhysRevA.81.052311

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a scheme for realizing quantum repeaterswith Rydberg-blockade-coupled atomic ensembles, based on a recently proposed collective encoding strategy. Rydberg-blockade-mediated two-qubit gates and efficient cooperative photon emission are employed to create ensemble-photon entanglement. Thanks to deterministic entanglement swapping operations via Rydberg-based two-qubit gates, and to the suppression of multiexcitation errors by the blockade effect, the entanglement distribution rate of the present scheme is higher by orders of magnitude than the rates achieved by other ensemble-based repeaters. We also show how to realize temporal multiplexing with this system, which offers an additional speedup in entanglement distribution.

引用

页数：7