Quantum State Transfer among Three Ring-Connected Atoms

A robust quantum state transfer scheme is discussed for three atoms that are trapped by separated cavities linked via optical fibers in a ring connection. It is shown that, under the effective three-atom Ising model, an arbitrary unknown quantum state can be transferred from one atom to another dete...

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Published inChinese physics letters Vol. 32; no. 6; pp. 10 - 14
Main Author 郭彦青 邓尧 裴培 仝殿民 王殿夫 宓东
Format Journal Article
LanguageEnglish
Published 01.06.2015
Subjects
Cost engineering
Deltas
Holes
Ising模型
Lasers
Leakage
Optical fibers
Spontaneous emission
Texts
三环
传输方案
光纤连接
原子转移
原子间
时间成本
量子态
Online AccessGet full text
ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/32/6/060303

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Summary:A robust quantum state transfer scheme is discussed for three atoms that are trapped by separated cavities linked via optical fibers in a ring connection. It is shown that, under the effective three-atom Ising model, an arbitrary unknown quantum state can be transferred from one atom to another deterministically via an auxiliary atom with maximum unit fidelity. The only required operation for this scheme is replicating turning on/off the local laser fields applied to the atoms for two steps with time cost √2π/Γ0. The scheme is insensitive to cavity leakage and atomic position due to the condition Δ≈κ》g. Another advantage of this scheme is that the cooperative influence of spontaneous emission and operating time error can reduce the time cost for maximum fidelity and thus can speed up the implementation of quantum state transfer.
Bibliography:11-1959/O4
A robust quantum state transfer scheme is discussed for three atoms that are trapped by separated cavities linked via optical fibers in a ring connection. It is shown that, under the effective three-atom Ising model, an arbitrary unknown quantum state can be transferred from one atom to another deterministically via an auxiliary atom with maximum unit fidelity. The only required operation for this scheme is replicating turning on/off the local laser fields applied to the atoms for two steps with time cost √2π/Γ0. The scheme is insensitive to cavity leakage and atomic position due to the condition Δ≈κ》g. Another advantage of this scheme is that the cooperative influence of spontaneous emission and operating time error can reduce the time cost for maximum fidelity and thus can speed up the implementation of quantum state transfer.
GUO Yan-Qing, DENG Yao, PEI Pei, TONG Dian-Min, WANG Dian-Fu, MI Dong（1 Department of Physics, Dalian Maritime University, Dalian 116026 ; 2School of Physics, Shandong University, Jinan 250100）
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/32/6/060303