Black hole metamorphosis and stabilization by memory burden

被引：65

作者：

Dvali, Gia ^{[1
,2
]}

Eisemann, Lukas ^{[1
,2
]}

Michel, Marco ^{[1
,2
]}

Zell, Sebastian ^{[1
,2
,3
]}

机构：

[1] Ludwig Maximilians Univ Munchen, Arnold Sommerfeld Ctr, Theresienstr 37, D-80333 Munich, Germany

[2] Max Planck Inst Phys & Astrophys, Fohringer Ring 6, D-80805 Munich, Germany

[3] Ecole Polytech Fed Lausanne, Lab Particle Phys & Cosmol, Inst Phys, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW D | 2020年 / 102卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.102.103523

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Systems of enhanced memory capacity are subjected to a universal effect of memory burden, which suppresses their decay. In this paper, we study a prototype model to show that memory burden can be overcome by rewriting stored quantum information from one set of degrees of freedom to another one. However, due to a suppressed rate of rewriting, the evolution becomes extremely slow compared to the initial stage. Applied to black holes, this predicts a metamorphosis, including a drastic deviation from Hawking evaporation, at the latest after losing half of the mass. This raises a tantalizing question about the fate of a black hole. As two likely options, it can either become extremely long lived or decay via a new classical instability into gravitational lumps. The first option would open up a new window for small primordial black holes as viable dark matter candidates.

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