Wormholes, a fluctuating cosmological constant and the Coleman mechanism

被引：4
|
作者：
Ambjorn, J. [1 ,2 ]
Sato, Y. [3 ,4 ]
Watabiki, Y. [5 ]
机构：
[1] Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark
[2] Radboud Univ Nijmegen, IMAPP, Heyendaalseweg 135, NL-6525 AJ Nijmegen, Netherlands
[3] Nagoya Univ, Inst Adv Res, Chikusa Ku, Nagoya, Aichi 4648602, Japan
[4] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan
[5] Tokyo Inst Technol, Dept Phys, High Energy Theory Grp, Meguro Ku, 2-12-1 Oh Okayama, Tokyo 1528551, Japan
来源：
PHYSICS LETTERS B | 2021年 / 815卷
关键词：
Quantum gravity; Low dimensional models; Lattice models;
D O I：
10.1016/j.physletb.2021.136152
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that in a two-dimensional model of quantum gravity the summation over all possible wormhole configurations leads to a kind of Coleman mechanism where the cosmological constant plays no role for large universes. Observers who are unable to observe the change in topology will naturally interpret the measurements of the size of the universe as being caused by a fluctuating cosmological constant, rather than fluctuating topology of spacetime. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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页数：5
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