Entanglement witnesses generated by positive maps

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• 作者：Wei Yang (1)
  
  1. Department of Mathematics and Physics ; Shanghai Dianji University ; Shanghai ; 201306 ; People鈥檚 Republic of China
  
• 关键词：Quantum states ; Entanglement witnesses ; Positive maps ; Affine maps
• 刊名：Quantum Information Processing
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：14
• 期：1
• 页码：287-301
• 全文大小：177 KB
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• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Physics
  Mathematics
  Engineering, general
  Computer Science, general
  Characterization and Evaluation Materials
  
• 出版者：Springer Netherlands
• ISSN：1573-1332

文摘

Entanglement witnesses are non-positive Hermitian operators which can detect whether a quantum state is entangled. Positive maps based on one and two given quantum states are constructed, and entanglement witnesses are generated by composing the positive maps with affine maps. An entanglement witness example is given at the end.