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.

中文翻译：

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噪声环境中演化的W状态的可分离性

纠缠是量子信息处理的重要资源。我们提供了一个新的纠缠见证人来检测不断发展的W状态的纠缠。我们的结果表明，新的纠缠证人比其他证人或方法更好地匹配了演化中的W状态。新的见证人极大地提高了某些三量子位状态纠缠检测的性能。