Entanglement and Mixedness of a Superconducting Qubit Coupled to an Open Superconducting Cavity

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• 作者：A.-B. A. Mohamed ; H. Eleuch
• 关键词：entropy squeezing ; Bloch vector ; variance squeezing
• 刊名：Journal of Russian Laser Research
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：37
• 期：4
• 页码：353-360
• 全文大小：340 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Applied Optics, Optoelectronics and Optical Devices
  Laser Technology and Physics and Photonics
  Microwaves, RF and Optical Engineering
  Russian Library of Science
  
• 出版者：Springer New York
• ISSN：1573-8760
• 卷排序：37

文摘

We investigate entanglement and mixedness of a superconducting qubit coupled to the damped cavity field. We introduce a new measure for the mixedness and find that the phase damping of the cavity leads to simultaneous long-death of the entropy squeezing, the purity of the qubit states, and the entanglement of the field–qubit system.