期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 11, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2021/11/037
关键词
quantum cosmology; cosmic singularity
资金
- NSF [PHY-1912168]
- Student Engagement Network (SEN)
- Dalton Undergraduate Student Research Fund for Women in the Sciences
Quasiclassical methods are used to determine dynamical tunneling times in quantum cosmological bounce models, showing that even with large barriers, tunneling times remain short, highlighting the quantum instability of the underlying models.
Quasiclassical methods are used to define dynamical tunneling times in models of quantum cosmological bounces. These methods provide relevant new information compared with the traditional treatment of quantum tunneling by means of tunneling probabilities. As shown here, the quantum dynamics in bounce models is not secure from reaching zero scale factor, re-opening the question of how the classical singularity may be avoided. Moreover, in the examples studied here, tunneling times remain small even for large barriers, highlighting the quantum instability of underlying bounce models.
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