Control of the Entanglement between Two Josephson Charge Qubits

被引：13

作者：

Liao Qing-Hong ^{[1
]}

Fang Guang-Yu ^{[1
]}

Wang Ji-Cheng ^{[1
]}

Ahmad, Muhammad Ashfaq ^{[2
]}

Liu Shu-Tian ^{[1
]}

机构：

[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China

[2] COMSATS Inst Informat Technol, Dept Phys, Lahore 54000, Pakistan

来源：

CHINESE PHYSICS LETTERS | 2011年 / 28卷 / 06期

基金：

中国国家自然科学基金;

关键词：

SUPERCONDUCTING QUBITS; QUANTUM-STATE; THEOREM;

D O I：

10.1088/0256-307X/28/6/060307

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider a model which consists of two coupled superconducting charge qubits by sharing a large Josephson junction. The time evolution of entanglement between two Josephson charge qubits is investigated by employing the concurrence. We examine the influence of the initial mean photon number, the relative phase and the amplitude of the two qubits on the time evolution of entanglement. The results show that the initial mean photon number, the relative phase and the amplitude of the two qubits play an important role in the evolution of entanglement.

引用

页数：4

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