期刊
PHYSICAL REVIEW LETTERS
卷 127, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.161301
关键词
-
资金
- National Science Centre, Poland [2019/32/T/ST2/00389]
- National Science Centre Poland
By using Monte Carlo computer simulations, the study investigates the impact of matter fields on the geometry of a typical quantum universe in the causal dynamical triangulations model of lattice quantum gravity. A phase transition caused by the scalar field is observed and it can change the topology of quantum universes with nontrivial topology to a simply connected one.
Using Monte Carlo computer simulations, we study the impact of matter fields on the geometry of a typical quantum universe in the causal dynamical triangulations (CDT) model of lattice quantum gravity. The quantum universe has the size of a few Planck lengths and the spatial topology of a three-torus. The matter fields are multicomponent scalar fields taking values in a torus with circumference delta in each spatial direction, which acts as a new parameter in the CDT model. Changing d, we observe a phase transition caused by the scalar field. This discovery may have important consequences for quantum universes with nontrivial topology, since the phase transition can change the topology to a simply connected one.
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