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Quantum Big Bang without fine-tuning in a toy-model
- 1.0385492 - ÚJF 2013 RIV GB eng J - Journal Article
Znojil, Miloslav
Quantum Big Bang without fine-tuning in a toy-model.
Journal of Physics Conference Series. Roč. 343, 012136 (2012), s. 1-20. ISSN 1742-6588.
[7th International Conference on Quantum Theory and Symmetries (QTS7). Praha, 07.08.2011-13.08.2011]
R&D Projects: GA MŠMT LC06002; GA ČR GAP203/11/1433
Institutional support: RVO:61389005
Keywords : PT-symmetry * Covariant theory * gravity
Subject RIV: BE - Theoretical Physics
The question of possible physics before Big Bang (or after Big Crunch) is addressed via a schematic non-covariant simulation of the loss of observability of the Universe. Our model is drastically simplified by the reduction of its degrees of freedom to the mere finite number. The Hilbert space of states is then allowed time-dependent and singular at the critical time t = t(c). This option circumvents several traditional theoretical difficulties in a way illustrated via solvable examples. In particular, the unitary evolution of our toy-model quantum Universe is shown interruptible, without any fine-tuning, at the instant of its bang or collapse t = t(c).
Permanent Link: http://hdl.handle.net/11104/0216886
Number of the records: 1