Wormholes, a fluctuating cosmological constant and the Coleman mechanism
Wormholes, a fluctuating cosmological constant and the Coleman mechanism
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虫洞、波动的宇宙常数和科尔曼机制
DOI：
10.1016/j.physletb.2021.136152
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Y. Watabiki
中科院分区：
文献类型：
--
作者：
J. Ambjorn;Y.Sato;Y. Watabiki
我们表明，在量子引力的二维模型中，所有可能的虫洞构型的求和导致了一种科尔曼机制，其中宇宙学常数对大宇宙没有作用。无法观察到拓扑变化的观察者自然会将测量宇宙大小的结果解读为宇宙常数的波动，而不是时空拓扑的波动。
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.