The cosmological constant from space-time discreteness

分类： 物理学 >> 基本粒子与场物理学 提交时间： 2020-09-06

Qi-Qi Fan Cong Li Hao-Ran Zhang Peng-Zhang He, Jian-Bo Deng

摘要： We regard the background of space-time as a physical system composed of discrete volume elements at the Planck scale and get the internal energy of space-time by Debye model. A temperature-dependent minimum energy limit of the particles is proposed from the thermal motion part of the internal energy. As decreases of the temperature caused by the expansion of the universe, more and more particles would be "released" because of the change of the energy limit, we regard these new particles as a source of dark energy. The minimum energy limit also leads to a corrected number of particles in universe and a modified conservation equation. According to the modified conservation equation, an effective cosmological constant consistent with its observed value is obtained.

同行评议状态:待评议

 点击量 15462  下载量 1679  评论