Quantum Binary Symmetric Channels

Chin. Phys. Lett.

2001, Vol. 18

Issue (6): 721-723 DOI:

Original Articles

Quantum Binary Symmetric Channels

CHEN Xiao-Yu¹;QIU Pei-Liang²

¹Division of Physics, China Institute of Metrology, Hangzhou 310034 ²Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027

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CHEN Xiao-Yu, QIU Pei-Liang 2001 Chin. Phys. Lett. 18 721-723

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Abstract Quantum binary symmetric channels are defined via the invariance of fidelity under unitary transformations of the input density operators. In this definition, they not only include the most studied case of the depolarizing channel but also other channels. We investigate the character of the latter and find the maximum of the coherent information to estimate the capacities of the channels.

Keywords: 03.67.-a

Published: 01 June 2001

PACS:

03.67.-a

(Quantum information)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2001/V18/I6/0721

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	QIU Pei-Liang

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