2013/12/08 by Avik Roy, A. Roy, Moinul Hossain Rahat +6
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Computer science #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Physics #Quantum #Quantum Mechanics and Applications #Quantum many-body systems #Quantum mechanics #Statistical physics #Theoretical physics #hep-th
paper · pdf · doi:10.48550/arxiv.1312.2176
20 pages. 2 figures, reported some new findings in a separate section, major update from previous version
openalex publication_date 2013/12/08 · arxiv created 2014/12/17 · arxiv updated 2014/12/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we analyze whether quantum correlations between successive steps of evaporation can open any way to resolve the black hole information paradox. Recently a celebrated result in literature shows that `small' correction to leading order Hawking analysis fails to restore unitarity in black hole evaporation. We study a toy qubit model of evaporation allowing small quantum correlations between successive steps and verify the previous result. Then we generalize the concept of correction to Hawking state by relaxing the `smallness' condition. Our result generates a nontrivial upper and lower bound on change in entanglement entropy in the evaporation process. This gives us a quantitative measure of correction that would mathematically facilitate restoration of unitarity in black hole evaporation. We then investigate whether this result is compatible to the established physical constraints of unitary evolution of a state in a subsystem. We find that the generalized bound on entanglement entropy leads to significant deviation from Page curve. This leads us to agree with the recent claim in literature that no amount of correction in the form of Bell pair states would lead to any resolution to the information paradox.