On the relation between classical and quantum cosmology in a two-dimensional dilaton-gravity model

1994 ◽  
Vol 11 (5) ◽  
pp. 1243-1253 ◽  
Author(s):  
M Önder ◽  
Robin W Tucker
Keyword(s):  
Gravity Model ◽  
Quantum Cosmology ◽  
Two Dimensional ◽  
Dilaton Gravity

scholarly journals TWO-DIMENSIONAL DESCRIPTION OF D-DIMENSIONAL STATIC BLACK HOLES WITH POINTLIKE SOURCES

2005 ◽  
Vol 20 (38) ◽  
pp. 2919-2924 ◽  
Author(s):  
MARIANO CADONI ◽  
SALVATORE MIGNEMI
Keyword(s):  
Black Holes ◽  
Gravity Model ◽  
2D Gravity ◽  
Two Dimensional ◽  
Dilaton Gravity

We derive two-dimensional (2D) solutions of a generic dilaton gravity model coupled with matter, which describe D-dimensional static black holes with pointlike sources. The equality between the mass M of the D-dimensional gravitational solution and the mass m of the source can also be preserved at the level of the 2D gravity model.

scholarly journals Islands in multiverse models

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Sergio E. Aguilar-Gutierrez ◽  
Aidan Chatwin-Davies ◽  
Thomas Hertog ◽  
Natalia Pinzani-Fokeeva ◽  
Brandon Robinson
Keyword(s):  
Saddle Point ◽  
Quantum Cosmology ◽  
Von Neumann Entropy ◽  
Coarse Grain ◽  
Two Dimensional ◽  
Dilaton Gravity ◽  
False Vacuum ◽  
Von Neumann ◽  
Eternal Inflation ◽  
Linear Dilaton

Abstract We consider multiverse models in two-dimensional linear dilaton-gravity theories as toy models of false vacuum eternal inflation. Coupling conformal matter we calculate the Von Neumann entropy of subregions. When these are sufficiently large we find that an island develops covering most of the rest of the multiverse, leading to a Page-like transition. This resonates with a description of multiverse models in semiclassical quantum cosmology, where a measure for local predictions is given by saddle point geometries which coarse-grain over any structure associated with eternal inflation beyond one’s patch.

scholarly journals THERMODYNAMIC DUALITY BETWEEN RN BLACK HOLE AND 2D DILATON GRAVITY

2008 ◽  
Vol 23 (02) ◽  
pp. 91-98 ◽  
Author(s):  
YUN SOO MYUNG ◽  
YONG-WAN KIM ◽  
YOUNG-JAI PARK
Keyword(s):  
Black Hole ◽  
Thermodynamic Quantities ◽  
Two Dimensional ◽  
Dilaton Gravity ◽  
Horizon Thermodynamics

All thermodynamic quantities of the Reissner–Nordström (RN) black hole can be obtained from the dilaton and its potential of two-dimensional (2D) dilaton gravity. The dual relations of four thermodynamic laws are also established. Furthermore, the near-horizon thermodynamics of the extremal RN black hole is completely described by the Jackiw–Teitelboim theory which is obtained by perturbing around the AdS2-horizon.

Two-dimensional quantum cosmology: Directions of dynamical and thermodynamic arrows of time

1989 ◽  
Vol 39 (2) ◽  
pp. 462-469 ◽  
Author(s):  
Takeshi Fukuyama ◽  
Masahiro Morikawa
Keyword(s):  
Quantum Cosmology ◽  
Two Dimensional

scholarly journals Diffeomorphisms, Noether charges, and the canonical formalism in two-dimensional dilaton gravity

1995 ◽  
Vol 52 (12) ◽  
pp. 6831-6839 ◽  
Author(s):  
José Navarro-Salas ◽  
Miguel Navarro ◽  
César F. Talavera
Keyword(s):  
Canonical Formalism ◽  
Two Dimensional ◽  
Dilaton Gravity

Sine-Gordon solitons coupled with dilaton gravity in two-dimensional spacetime

1996 ◽  
Vol 53 (2) ◽  
pp. 801-804 ◽  
Author(s):  
Hyeon-Min Johng ◽  
Hak-Soo Shin ◽  
Kwang-Sup Soh
Keyword(s):  
Two Dimensional ◽  
Dilaton Gravity ◽  
Dimensional Spacetime

scholarly journals Thermodynamics of AdS/QCD within the 5D dilaton-gravity model

2010 ◽  
Vol 207-208 ◽  
pp. 333-336 ◽  
Author(s):  
E. Megías ◽  
H.J. Pirner ◽  
K. Veschgini
Keyword(s):  
Gravity Model ◽  
Dilaton Gravity
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