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利用Peres判据测量混合态量子系统的纠缠
  • ISSN号：1674-1056
  • 期刊名称：《中国物理B：英文版》
  • 时间：0
  • 分类：O413[理学—理论物理;理学—物理]
  • 作者机构：[1]山东科技大学理学院,山东青岛266510
  • 相关基金：国家自然科学基金资助项目（10704031）
作者： 李照鑫[1], 徐岩[1]
关键词： 量子信息, 纠缠态, 约瑟夫森结, 电荷量子比特, quantum information, entanglement state, Josephson junction, charge qubit
中文摘要：

量子纠缠是量子信息和量子计算的关键资源，研究初态为混合态的电荷量子比特与单模量子化光场之间的纠缠，根据Peres的可分离态的密度矩阵部分转置正定（PPT）判据，测量系统的纠缠并观察初态的混合度λ和失谐量△对系统纠缠随时间演化的影响。

英文摘要：

Quantum entanglement is a key resource in quantum information processing and quantum calculation. Taking the initial mixed state of a charge qubit and a single-mode quantum field into account, we compute the entanglement degree for the detuned system between them by the Peres＇ PPT （positive partial transposition） criterion, and investigate the function of the mixture λ and the detuning quantity △ to control the entanglement.

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期刊信息
  • 《中国物理B：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会和中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京 中关村 中国科学院物理研究所内
  • 邮编：100080
  • 邮箱：
  • 电话：010-82649026 82649519
  • 国际标准刊号：ISSN：1674-1056
  • 国内统一刊号：ISSN：11-5639/O4
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 被引量:406