Entanglement production by quantum error correction in the presence of correlated environment

被引：3

作者：

De Chiara, G

Fazio, R

Macchiavello, C

Palma, GM

机构：

[1] INFM, NEST, I-56126 Pisa, Italy

[2] Scuola Normale Super Pisa, I-56126 Pisa, Italy

[3] Univ Pavia, INFM, I-27100 Pavia, Italy

[4] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy

[5] Univ Milan, INFM, NEST, I-26013 Crema, CR, Italy

[6] Univ Milan, Dipartimento Tecnol Informaz, I-26013 Crema, CR, Italy

来源：

EUROPHYSICS LETTERS | 2004年 / 67卷 / 05期

关键词：

D O I：

10.1209/epl/i2004-10118-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the effect of a quantum error correcting code on the entanglement of encoded logical qubits in the presence of a dephasing interaction with a correlated environment. Such correlated reservoir introduces entanglement between physical qubits. We show that for short times the quantum error correction interprets such entanglement as errors and suppresses it. However, for longer time, although quantum error correction is no longer able to correct errors, it enhances the rate of entanglement production due to the interaction with the environment.

引用

页码：714 / 720

页数：7

共 14 条

[1] Active suppression of dephasing in Josephson-junction qubits [J].