Cosmology and the S matrix

By R. Bousso. 2004

217 citations recorded by the source corpus.

We study conditions for the existence of asymptotic observables in cosmology. With the exception of de Sitter space, the thermal properties of accelerating universes permit arbitrarily long observations, and guarantee the production of accessible states of arbitrarily large entropy. This suggests that some asymptotic observables may exist, despite the presence of an event horizon. Comparison with decelerating universes shows surprising similarities: Neither type suffers from the limitations encountered in de Sitter space, such as thermalization and boundedness of entropy. However, we argue that no realistic cosmology permits the global observations associated with an S-matrix.

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

View Paper: https://www.semanticscholar.org/paper/21fde91133936842b7df9a29d437e8f2c508e160

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. V. Hubeny
2. M. Rangamani
3. R. Myers
4. Alberto Nicolis
5. César Gómez
6. E. Trincherini
7. G. Dvali
8. D. Harlow

In Nuclear and High Energy Physics

1. V. Hubeny
2. R. Myers
3. M. Rangamani
4. D. Harlow
5. Alberto Nicolis
6. D. Stanford
7. T. Takayanagi
8. S. Shenker

In Statistical and Nonlinear Physics

1. R. Myers
2. V. Hubeny
3. M. Rangamani
4. César Gómez
5. Alberto Nicolis
6. S. Shenker
7. G. Dvali
8. D. Harlow

Citations in the corpus

• A Measure of de Sitter entropy and eternal inflation (2007, background): “Is there a way to be more concrete? In pure de Sitter any observer has access only to a small portion of the full spacetime, and it is not even clear what the observables are [46].”
• Quantum compositeness of gravity: black holes, AdS and inflation (2013, background): “This way to proceed will allow us to avoid the problems inherent to the lack of de Sitter S matrix [40], [41], [42]”
• Inflation in AdS/CFT (2005, background): “This second AdS boundary is an artifact of the thin wall approximation, and does not appear in the full solutions of scalar-gravity [35].”