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arXiv 1402.0624quant-ph
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多体纠缠在多面局域通道中演化的对称性

Symmetries of Multipartite Entanglement Evolution in Many-Sided Local Channels

Michael Siomau

摘要:

量子系统初态和量子信道的对称性同时作用于系统的各个部分,可以大大简化纠缠演化的描述。利用纠缠度作为纠缠度量,研究了当每个量子比特独立于其他量子比特受到局域信道影响时,系统的纠缠演化。我们表明,对于最终量子态的低秩密度矩阵,当只有一个量子位受到本地信道的影响时,这种复杂的纠缠动力学可以完全由代表初态纠缠演化的独立因素的组合来描述。

英文摘要:

Symmetries of the initial state of a quantum system and the quantum channels, which simultaneously affect parts of the system, can significantly simplify the description of the entanglement evolution. Using concurrence as the entanglement measure, we study the entanglement evolution of few qubit systems, when each of the qubits is affected by a local channel independently of the others. We show that, for low-rank density matrices of the final quantum state, such complex entanglement dynamics can be completely described by a combination of independent factors representing the evolution of entanglement of the initial state, when just one of the qubits is affected by a local channel.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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