Separability of evolving W state in a noise environment |
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| Authors: | Qian-Tong Men(
) Li-Zhen Jiang( í Í ) Xiao-Yu Chen(&#x Ï ) |
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| Affiliation: | College of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, China |
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| Abstract: | Entanglement is an important resource for quantum information processing. We provide a new entanglement witness to detect the entanglement of an evolving W state. Our results show that the new entanglement witness matches the evolving W state better than other witnesses or methods. The new witness significantly improves the performance of entanglement detection for some three-qubit states. |
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| Keywords: | entanglement witness separable criterion PPT criterion W state |
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