Entanglement witnesses generated by positive maps
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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.
KeywordsQuantum states Entanglement witnesses Positive maps Affine maps
The author would like to thank the editor and the reviewers for their constructive comments and suggestions to improve the quality of the paper. This work was funded by project 13XKJC01 from Leading Academic Discipline Project of Shanghai Dianji University and the funding scheme for training young teachers in colleges and universities in Shanghai (ZZSDJ14023).
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