报告题目 (Title)：Conditional Entanglement Transfer Via Black Holes（通过黑洞有条件的纠缠转移）

报告人 (Speaker)：Ali Akil（香港大学）

报告时间 (Time)：2023年10月31日（周二）15:00-16:30

报告地点 (Place)：校本部 D112

邀请人 (Inviter)：蔡文赫

主办部门：理学院物理系

报告摘要 (Abstract)：

We investigate the consistency of Hawking's black hole evaporation process with fundamental physical principles such as unitarity, no-signaling, entanglement monogamy, and the equivalence principle. We consider two matter particles inside the black hole, in a general, possibly entangled state. We then look at the Hawking pair production, one pair at a time. We assume the interaction between the Hawking negative energy particles and the black hole matter particles. The full evaporation of the black hole will correspond to the full annihilation of the black hole matter by the negative energy particles. We show that upon annihilation of the black hole matter particles, their entanglement will be transferred to the outside partners of the Hawking particles. The analysis suggests that standard quantum theory and general relativity can account for the entire state consisting of matter and radiation, which remains pure at every stage of the evaporation process. Furthermore, the final state after the full black hole evaporation is pure and in one-to-one correspondence with the initial state forming the black hole, indicating no information loss.