Does black-hole evaporation imply that physics is non-unitary, and if so, what must the laws of physics look like? An Essay

Quantum Circuit Model of Black Hole Evaporation

We consider a quantum circuit model describing the evaporation process of black holes. We specifically examine the behavior of the multipartite entanglement represented by this model, and find that the entanglement structure depends on the black hole mass $M$ and the frequency of the Hawking radiation $ω$. For sufficiently small values of $Mω$, the black hole and the radiation system becomes a separable state after the Page time and a firewall-like structure appears. On the contrary, for larger values of $Mω$, the entanglement between the black hole and the radiation is not lost. These behavio…

One-shot decoupling and Page curves from a dynamical model for black hole evaporation

One-shot decoupling is a powerful primitive in quantum information theory and was hypothesized to play a role in the black hole information paradox. We study black hole dynamics modeled by a trilinear Hamiltonian whose semiclassical limit gives rise to Hawking radiation. An explicit numerical calculation of the discretized path integral of the S-matrix shows that decoupling is exact in the continuous limit, implying that quantum information is perfectly transferred from the black hole to radiation. A striking consequence of decoupling is the emergence of an output radiation entropy profile tha…

广义不确定性原理对非广延黑洞热力学的影响

Generalized Uncertainty Principle Impact on Nonextensive Black Hole Thermodynamics

本文研究广义不确定性原理对黑洞非广延热力学的影响，考察多种非广延熵对应的温度与热容，发现GUP修正使黑洞蒸发终态为残余物，且会降低辐射稀疏性。

偏离热态的量子力学辐射黑洞热力学的普适性

Universality of the thermodynamics of a quantum-mechanically radiating black hole departing from thermality

本研究针对此前黑洞热力学普适性结论依赖严格热光谱近似的局限，利用黑洞动力学态概念，将Mathur和Mehta的相关结果推广至辐射光谱非严格热的量子力学辐射黑洞场景。