Gesteau, Elliott Kang, Monica Jinwoo

We give a general construction of a setup that verifies bulk reconstruction, conservation of relative entropies, and equality of modular flows between the bulk and the boundary, for infinite-dimensional systems with operator-pushing. In our setup, a bulk-to-boundary map is defined at the level of the $C^*$-algebras of state-independent observables....

Bronnikov, K. Santos, N. O. Wang, Anzhong

With the arrival of the era of gravitational wave astronomy, the strong gravitational field regime will be explored soon in various aspects. In this article, we provide a general review over cylindrical systems in Einstein's theory of general relativity. In particular, we first review the general properties, both local and global, of several import...

Alet, Fabien Hanada, Masanori Jevicki, Antal Peng, Cheng

We study some general properties of coupled quantum systems. We consider simple interactions between two copies of identical Hamiltonians such as the SYK model, Pauli spin chains with random magnetic field and harmonic oscillators. Such couplings make the ground states close to the thermofield double states of the uncoupled Hamiltonians. For the co...

alexeyev, stanislav sendyuk, maxim

We discuss black hole type solutions and wormhole type ones in the effective gravity models. Such models appear during the attempts to construct the quantum theory of gravity. The mentioned solutions, being, mostly, the perturbative generalisations of well-known ones in general relativity, carry out additional set of parameters and, therefore could...

Ageev, D. S. Aref’eva, I. Ya. Lysukhina, A. V.
Published in
Theoretical and Mathematical Physics

We investigate various aspects of AdS2 wormholes in Jackiw—Teitelboim gravity and their holographic applications. We first study the AdS2 space in global coordinates traversable by virtue of the presence of pointlike matter violating the dominant energy condition. We calculate the evolution of the entanglement entropy in such a system. We then inve...

ono, toshiaki asada, hideki

In order to clarify the effects of the finite distance from a lens object to a light source and a receiver, the gravitational deflection of light has been recently reexamined by using the Gauss&ndash / Bonnet (GB) theorem in differential geometry (Ishihara et al. 2016). The purpose of the present paper is to give a short review of a series of works...

övgün, ali

In this research, we used the Gibbons&ndash / Werner method (Gauss&ndash / Bonnet theorem) on the optical geometry of a black hole and wormhole, extending the calculation of weak gravitational lensing within the Maxwell&rsquo / s fish eye-like profile and dark-matter medium. The angle is seen as a partially topological effect, and the Gibbons&ndash...

Kadyrov, R. I. Glukhov, M. S. Statseuko, E. O. Galiulliu, B. M.
Published in
Chemistry and Technology of Fuels and Oils

Morphological changes of a lime reservoir pore structure that occurred during flooding with HCl solution (10 wt.%) are studied. A new method of measuring the lateral area of a wormhole is proposed for calculating the Damkohler number and consists of segmenting its boundaries into a digital model, calculating the surface area of resulting complicate...

Raidal, Martti Solodukhin, Sergey Vaskonen, Ville Veermäe, Hardi

The radiation emitted by horizonless exotic compact objects (ECOs), such as wormholes, 2-2-holes, fuzzballs, gravastars, boson stars, collapsed polymers, superspinars etc., is expected to be strongly suppressed when compared to the radiation of black holes. If large primordial curvature fluctuations collapse into such objects instead of black holes...

Jimenez, Jose Beltran Heisenberg, Lavinia Olmo, Gonzalo J. Rubiera-Garcia, Diego

General Relativity has shown an outstanding observational success in the scales where it has been directly tested. However, modifications have been intensively explored in the regimes where it seems either incomplete or signals its own limit of validity. In particular, the breakdown of unitarity near the Planck scale strongly suggests that General ...