Regenesis and quantum traversable wormholes
Abstract
Recent gravity discussions of a traversable wormhole indicate that in holographic systems signals generated by a source could reappear long after they have dissipated, with the need of only performing some simple operations. In this paper we argue the phenomenon, to which we refer as "regenesis", is universal in general quantum chaotic manybody systems, and elucidate its underlying physics. The essential elements behind the phenomenon are: (i) scrambling which in a chaotic system makes outoftimeordered correlation functions (OTOCs) vanish at large times; (ii) the entanglement structure of the state of the system. The latter aspect also implies that the regenesis phenomenon requires fine tuning of the initial state. Compared to other manifestations of quantum chaos such as the initial growth of OTOCs which deals with early times, and a random matrixtype energy spectrum which reflects very large time behavior, regenesis concerns with intermediate times, of order the scrambling time of a system. We also study the phenomenon in detail in general twodimensional conformal field theories in the large central charge limit, and highlight some interesting features including a resonant enhancement of regenesis signals near the scrambling time and their oscillations in coupling. Finally, we discuss gravity implications of the phenomenon for systems with a gravity dual, arguing that there exist regimes for which traversability of a wormhole is quantum in nature, i.e. cannot be associated with a semiclassical spacetime causal structure.
 Publication:

Journal of High Energy Physics
 Pub Date:
 October 2019
 DOI:
 10.1007/JHEP10(2019)048
 arXiv:
 arXiv:1810.01444
 Bibcode:
 2019JHEP...10..048G
 Keywords:

 AdSCFT Correspondence;
 Conformal Field Theory;
 Holography and condensed matter physics (AdS/CMT);
 High Energy Physics  Theory;
 Condensed Matter  Statistical Mechanics;
 General Relativity and Quantum Cosmology;
 Nonlinear Sciences  Chaotic Dynamics;
 Quantum Physics
 EPrint:
 doi:10.1007/JHEP10(2019)048