Faithful qubit transmission against collective noise without ancillary qubits

被引：130
作者：
Li, Xi-Han
Deng, Fu-Guo [1 ]
Zhou, Hong-Yu
机构：
[1] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
[2] Beijing Normal Univ, Inst Low Energy Nucl Phys, Key Lab Beam Technol & Mat Modificat Minist, Beijing 100875, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 14期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2794433
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a faithful qubit transmission scheme with linear optics against collective noise, not resorting to ancillary qubits. Its setup is composed of three unbalanced polarization interferometers, based on a polarizing beam splitter, a beam splitter, and a half wave plate, which makes this scheme more feasible than others with present technology. The fidelity of successful transmission is 1, independent of the parameters of the collective noise, and the success probability for obtaining an uncorrupted state can be improved to 100% with some time delayers. Moreover, this scheme has some good applications in one-way quantum communication for rejecting the errors caused by the collective noise in quantum channel. (C) 2007 American Institute of Physics.
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