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Thoughts on Tachyon Cosmology

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arxiv hep-th/0301117 v1 pith:775BWYD7 submitted 2003-01-16 hep-th

G.W. Gibbons This is my paper · ORCID
classification hep-th
keywords tachyoncosmologyinflationarypossiblesomestringthereaccelerating
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After a pedagogical review of elementary cosmology, I go on to discuss some obstacles to obtaining inflationary or accelerating universes in M/String Theory. In particular, I give an account of an old No-Go Theorem to this effect. I then describe some recent ideas about the possible r\^ole of the tachyon in cosmology. I stress that there are many objections to a naive inflationary model based on the tachyon, but there remains the possiblity that the tachyon was important in a possible pre-inflationary Open-String Era preceding our present Closed String Era.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 221 citations worldwide. Full citation record

  1. From Galilei to Euclidean Carroll and the Alice Particle: The Times They Are a-Changin'

    hep-th 2026-07 accept novelty 7.5 of 10

    Making time transversal turns p-brane Galilei limits into Euclidean p-brane Carroll limits, yielding for p=0 a centrally extended Alice algebra and Alice particle obtained from critical tachyon limits or two-time null...

  2. Universal Cosmologies

    hep-th 2025-05 conditional novelty 5.0 of 10

    For open FLRW universes in two-scalar exponential-potential models from 10d IIA supergravity, the late-time attractor sets the effective exponent to the shortest vector to the convex hull of potential exponents, givin...

  3. de Sitter Vacua in the String Landscape

    hep-th 2019-08 conditional novelty 5.0 of 10

    A time-dependent type IIB construction, analyzed via M-theory uplift, is claimed to allow 4D de Sitter vacua with a time-independent Newton constant, provided certain quantum corrections obey specific inequalities.

  4. Analytical calculation of the observational parameters for tachyon inflation

    gr-qc 2026-05 unverdicted novelty 4.0 of 10

    Authors introduce new Hubble rate test functions for tachyon inflation, derive analytical ns and r using assumed slow-roll parameter dependence, and compare predictions to Planck data.

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