论文标题
反射熵的岛屿
Islands for Reflected Entropy
论文作者
论文摘要
最近的工作表明，在计算QFT状态的纠缠熵与半经典重力区域的纠缠熵时，有必要包括纠缠岛的贡献。我们为反射熵提出了一个新的公式，其中包括来自此类岛屿的其他贡献。我们通过找到包括广义复制虫洞的其他马鞍来从重力路径积分中得出该公式。我们还证明，我们的协变量公式满足反射熵所需的所有不平等。我们在各种示例中使用了此公式，这些公式证明了它在说明熵不可见的多部分纠缠的结构中的相关性。
Recent work has demonstrated the need to include contributions from entanglement islands when computing the entanglement entropy in QFT states coupled to regions of semiclassical gravity. We propose a new formula for the reflected entropy that includes additional contributions from such islands. We derive this formula from the gravitational path integral by finding additional saddles that include generalized replica wormholes. We also demonstrate that our covariant formula satisfies all the inequalities required of the reflected entropy. We use this formula in various examples that demonstrate its relevance in illustrating the structure of multipartite entanglement that are invisible to the entropies.
