Quantum-information processing with a single photon by an input-output process with respect to low-Q cavities

被引：194

作者：

An, Jun-Hong ^{[1
,2
,3
]}

Feng, M. ^{[4
]}

Oh, C. H. ^{[1
,2
]}

机构：

[1] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117543, Singapore

[3] Lanzhou Univ, Dept Modern Phys, Lanzhou 730000, Peoples R China

[4] Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China

来源：

PHYSICAL REVIEW A | 2009年 / 79卷 / 03期

关键词：

Faraday effect; information theory; quantum computing; quantum electrodynamics; quantum entanglement; quantum optics; ENTANGLEMENT; ATOMS;

D O I：

10.1103/PhysRevA.79.032303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Both cavity quantum electrodynamics and photons are promising candidates for quantum information processing. We consider a combination of both candidates with a single photon going through spatially separate cavities to entangle the atomic qubits, based on the input-output process of the cavities. We present a general expression for the input-output process regarding the low-Q cavity confining a single atom, which works in a wide range of parameters. Focusing on low-Q cavity case, we propose some schemes for quantum information processing with Faraday rotation using single photons, which is much different from the high-Q cavity and strong-coupling cases.

引用

页数：7