Islands outside the horizon
Islands outside the horizon
复制标题
DOI：
--
复制
发表时间：
2019-10
期刊：
影响因子：
--
通讯作者：
Ahmed Almheiri;R. Mahajan;J. Maldacena
中科院分区：
文献类型：
--
作者：
Ahmed Almheiri;R. Mahajan;J. Maldacena
我们考虑一个AdS 2黑洞与一个浴池平衡，我们把它作为一个对偶描述，即（0+1）维量子力学系统与作为浴池的（1+1）维场论耦合.我们分别计算量子力学自由度和浴的熵，同时允许来自纠缠楔“岛”的贡献。我们发现岛延伸到黑洞视界之外的情况。这表明可能的因果悖论，我们表明，避免了，因为量子聚焦猜想。最后，我们制定了一个版本的信息悖论的一个黑洞与浴在Hartle-Hawking状态，并证明了岛屿在解决这个悖论的作用。
We consider an AdS$_2$ black hole in equilibrium with a bath, which we take to have a dual description as (0+1)-dimensional quantum mechanical system coupled to a (1+1)-dimensional field theory serving as the bath. We compute the entropies of both the quantum mechanical degrees of freedom and of the bath separately, while allowing contributions from entanglement wedge "islands". We find situations where the island extends {\it outside} the black hole horizon. This suggests possible causality paradoxes which we show are avoided because of the quantum focusing conjecture. Finally, we formulate a version of the information paradox for a black hole in contact with a bath in the Hartle-Hawking state, and demonstrate the role of islands in resolving this paradox.