Oscillating and static universes from a single barotropic fluid

Journal Article · Wed Dec 09 00:00:00 EST 2015 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2015/12/015· OSTI ID:22458410

Kehayias, John; Scherrer, Robert J. ^[1]

---

1. Physics & Astronomy Department, Vanderbilt University, PMB 401807,2301 Vanderbilt Place, Nashville, TN, 37235-1807 United States (United States)

We consider cosmological solutions to general relativity with a single barotropic fluid, where the pressure is a general function of the density, p=f(ρ). We derive conditions for static and oscillating solutions and provide examples, extending earlier work to these simpler and more general single-fluid cosmologies. Generically we expect such solutions to suffer from instabilities, through effects such as quantum fluctuations or tunneling to zero size. We also find a classical instability (“no-go” theorem) for oscillating solutions of a single barotropic perfect fluid due to a necessarily negative squared sound speed.

• Sponsoring Organization: SCOAP3, CERN, Geneva (Switzerland)
• OSTI ID: 22458410
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 12; Other Information: PUBLISHER-ID: JCAP12(2015)015; OAI: oai:repo.scoap3.org:13001; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FLUCTUATIONS
GENERAL RELATIVITY THEORY
IDEAL FLOW
MATHEMATICAL SOLUTIONS
QUANTUM COSMOLOGY
SOUND WAVES
TUNNEL EFFECT
UNIVERSE