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Microstructure in matrix elements
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DOI：10.1007/JHEP09(2022)070.png)
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We investigate the simple model of Pennington, Shenker, Stanford and Yang for modeling the density matrix of Hawking radiation, but further include dynamics for EOW branes behind the horizon. This allows interactions that scatter one interior state to another, and also allows EOW loops. At strong coupling, we find that EOW states are no longer random; the ensemble has collapsed, and coupling constants encode the microscopic matrix elements of Hawking radiation. This suggests strong interior dynamics are important for understanding evaporating black holes, without any ensemble average. In this concrete model the density matrix of the radiation deviates from the thermal state, small off-diagonal fluctuations encode equivalences between naively orthogonal states, and bound the entropy from above. For almost evaporated black holes the off-diagonal terms become as large as the diagonal ones, eventually giving a pure state. We also find the unique analytic formula for all Renyi entropies.
Keyword:
2D Gravity
AdS-CFT Correspondence
Matrix Models
Models of Quantum Gravity
期刊
IF:
5.5
论文数:
4.0W
被引数:
13.7W
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引用论文
Entanglement Entropies of Equilibrated Pure States in Quantum Many-Body Systems and Gravity.png)
PRX QUANTUMOAAI
PRX QUANTUMIF11
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