Quantum exclusion of positive cosmological constant?

By G. Dvali, César Gómez. 2014

134 citations recorded by the source corpus.

We show that a positive cosmological constant is incompatible with the quantum‐corpuscular resolution of de Sitter metric in form of a coherent state. The reason is very general and is due to the quantum self‐destruction of the coherent state as a result of the scattering of constituent graviton quanta. This process creates an irreversible quantum clock, which precludes eternal de Sitter. It also eliminates the possibility of Boltzmann brains and Poincare recurrences. This effect is expected to be part of any microscopic theory that takes into account the quantum corpuscular structure of the cosmological background. This observation puts the cosmological constant problem in a very different light, promoting it, from a naturalness problem, into a question of quantum consistency. We are learning that quantum gravity cannot tolerate exceedingly‐classical sources.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/9d02d64d48df773f4b1f4c7f6574d8656b92e04c

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In Astronomy and Astrophysics

1. César Gómez
2. Eran Palti
3. G. Dvali
4. S. Zell
5. E. Komatsu
6. Claudia de Rham
7. J. Khoury
8. Xingang Chen

In Nuclear and High Energy Physics

1. César Gómez
2. Eran Palti
3. G. Dvali
4. S. Zell
5. E. Komatsu
6. Claudia de Rham
7. J. Khoury
8. K. Koyama

In Statistical and Nonlinear Physics

1. César Gómez
2. G. Dvali
3. Eran Palti
4. S. Zell
5. E. Komatsu
6. Claudia de Rham
7. Stefan Nobbenhuis
8. Cosimo Bambi

Citations in the corpus

• The Swampland: Introduction and Review (2019, background): “In [434,457,458] a different argument for an instability of de Sitter space was presented.”
• New physics from the polarized light of the cosmic microwave background (2022, background): “Such a discovery would have a far-reaching consequence for quantum gravity: As Λ > 0 is difficult to realise in quantum gravity 130,131 , a recent ‘Swamp-land’ proposal 132–134 favours a dynamical scalar field as the origin of dark energy 135,136 .”
• Quantum break-time of de Sitter (2017, background): “The estimated quantum break-time is tq ∼ N/ √ Λ [1, 5].”