Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence
Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence
复制标题
通过相位退相干放大公共环境中两个未耦合量子位之间的量子不一致
DOI:
10.1088/0953-4075/43/16/165503
复制
发表时间:
2010-05
期刊:
影响因子:
--
通讯作者:
Jie-Qiao Liao
中科院分区:
文献类型:
--
作者:
Ji-Bing Yuan;Le-Man Kuang;Jie-Qiao Liao
We study analytically the dynamic behaviours of quantum correlation measured by a quantum discord between two uncoupled qubits, which are immersed in a common Ohmic environment. We show that the quantum discord of the two non-interacting qubits can be greatly amplified or protected for certain initially prepared X-type states in the time evolution. In particular, it is found that stable amplification of the quantum discord exists for the case of two identical qubits, and the quantum discord can be protected for the case of two different qubits with a large detuning. It is also indicated that in general a sudden change of the quantum discord occurs in the time evolution at a critical time point tc, and the discord amplification and protection may occur only in the time interval for certain X-type states. This sheds new light on the creation and protection of quantum correlation.
登录
查看更多内容
DOI:
--
发表时间:
1998-03
期刊:
Dictionary of Geotourism
影响因子:
--
作者:
Klaus Völker
通讯作者:
Klaus Völker
影响因子:
2.9
作者:
L. Kuang;H. Zeng;Zhao-yang Tong
通讯作者:
L. Kuang;H. Zeng;Zhao-yang Tong
影响因子:
8.6
作者:
Ollivier, H;Zurek, WH
通讯作者:
Zurek, WH
影响因子:
2.9
作者:
Werlang, T.;Souza, S.;Villas-Boas, C. J.
通讯作者:
Villas-Boas, C. J.
影响因子:
8.6
作者:
Piani, Marco;Horodecki, Pawel;Horodecki, Ryszard
通讯作者:
Horodecki, Ryszard