| Channel Coupling: Entanglement Preservation via Unentangled Correlations |
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| Lina Chang,Shunlong Luo. Channel Coupling: Entanglement Preservation via Unentangled Correlations. International Journal of Software and Informatics, 2014,8(3-4):255~264 |
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| Fund:This work is sponsored by the National Natural Science Foundation of China, Grant Nos. 11375259, 61134008, and the National Center for Mathematics and Interdisciplinary Sciences, Chinese Academy of Sciences, Grant No. Y029152K51. |
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| Abstract:Give two quantum channels acting on di?erent systems, we provide a natural and powerful method for coupling them by virtue of correlations between local environments. As an application, we demonstrate, through very simple examples, that separable (unentangled) correlations are a useful resource for preserving entanglement, which otherwise would be
completely destroyed by entanglement breaking channels if environmental correlations were absent. This reveals a mechanism for engineering environments in ˉghting decoherence. |
| keywords:channel coupling entanglement breaking correlations entanglement protection |
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