Correlation loss and multipartite entanglement across a black hole horizon
Correlation loss and multipartite entanglement across a black hole horizon
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DOI：
10.26421/qic9.7-8-8
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发表时间：
2007-01
期刊：
影响因子：
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通讯作者：
G. Adesso;Ivette Fuentes-Schuller
中科院分区：
文献类型：
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作者：
G. Adesso;Ivette Fuentes-Schuller
研究了纠缠场的霍金效应。从穿越史瓦西黑洞视界的自由落体（Kruskal）观测者的角度考虑处于双模压缩态的标量场，从视界外的史瓦西观测者的角度研究了该状态下量子相关和经典相关的退化。由于一夫一妻制对纠缠分布的限制，我们证明了在视界内外的模式中，失去的二部纠缠被恢复为多部纠缠。在小质量黑洞的极限中，视界外没有检测到二部纠缠，而连接内外区域的真正的多部纠缠无限增长。
We investigate the Hawking effect on entangled fields. By considering a scalar field which is in a two-mode squeezed state from the point of view of freely falling (Kruskal) observers crossing the horizon of a Schwarzschild black hole, we study the degradation of quantum and classical correlations in the state from the perspective of Schwarzschild observers confined outside the horizon. Due to monogamy constraints on the entanglement distribution, we show that the lost bipartite entanglement is recovered as multipartite entanglement among modes inside and outside the horizon. In the limit of a small-mass black hole, no bipartite entanglement is detected outside the horizon, while the genuine multipartite entanglement interlinking the inner and outer regions grows infinitely.