Loop quantum cosmology from an alternative Hamiltonian

被引：5
|
作者：
Yang, Jinsong [1 ]
Zhang, Cong [2 ]
Ma, Yongge [2 ]
机构：
[1] Guizhou Univ, Sch Phys, Guiyang 550025, Guizhou, Peoples R China
[2] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
来源：
PHYSICAL REVIEW D | 2019年 / 100卷 / 06期
关键词：
GRAVITY; CONSTRAINT; OPERATOR; AREA;
D O I：
10.1103/PhysRevD.100.064026
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper, a new Hamiltonian constraint operator for loop quantum cosmology is constructed by using the Chem-Simons action. The quantum dynamics of the k = 0 cosmological model with respect to a massless scalar field as an emergent time is determined by a difference equation. The semiclassical analysis shows that the new quantum dynamics has the correct classical limit, and the classical big-bang singularity is again replaced by the quantum bounce. Interestingly, the inverse time evolution of the flat Friedmann-Robertson-Walker cosmological model determined by the effective Hamiltonian will be bounced to an asymptotic de Sitter universe.
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收藏
页数：9
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