理论物理通讯：英文版

Extremal Entangled Four-Qubit Pure States with Respect to Multiple Entropy Measures

Liu ., Dan Dan, Zhao, Xin, Long, Gui-Lu

Published Jan 1, 2008• 1 citation

OpenAlex

Abstract

Four-qubit 纠纷用一项最近的建议纠纷措施被调查了，多重熵措施(MEMS ) 。我们为 four-qubit 系统的状态的九个不同家庭执行了优化。纠缠的状态被发现了的某 extremal。

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理论物理通讯：英文版

Extremal Entangled Four-Qubit Pure States with Respect to Multiple Entropy Measures

Liu ., Dan Dan, Zhao, Xin, Long, Gui-Lu

Published Jan 1, 2008• 1 citation

OpenAlex

Abstract

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Extremal Entangled Four-Qubit Pure States with Respect to Multiple Entropy Measures

Dan Liu, Zhao Xin, Long Gui-Lu

Communications in Theoretical PhysicsFeb 1, 200813 citations

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Dan Liu, Xin Zhao, Long, Gui Lu

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Zhao Zhao, Hui Hui, Zhang +4 more

中国科学通报：英文版Jan 1, 20130 citations

A new entanglement measure, the multiple entropy measures (MEMS), is proposed to quantify quantum entanglement of multi-partite quantum state. The MEMS is vector-like with

m=[N/2]

, the integer part of

N/2

, components:

[S_1, S_2,..., S_m]

, and the

i

-th component

S_i

is the geometric mean of

i

-body partial entropy of the system. The

S_i

measures how strong an arbitrary

i

bodies from the system are entangled with the rest of the system. The MEMS is not only transparent in physical picture, but also simple to calculate. It satisfies the conditions for a good entanglement measure. We have analyzed the entanglement properties of the GHZ-state, the W-states and cluster-states under MEMS. The cluster-state is more entangled than the GHZ-state and W-state under MEMS.