Thoughts on tachyon cosmology

By G. W. Gibbons. 2003

158 citations recorded by the source corpus.

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 role 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 possibility that the tachyon was important in a possible pre-inflationary ‘open string era’ preceding our present ‘closed string era’.

Subfields: Artificial Intelligence, Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/1ec65e0c5e5e2a3b47972249c6fb74ca5fb6524f

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Citations in the corpus

Conformal Carroll groups (2014, background): “The situation started to change when attention was drawn to the rôle of Carrollian symmetry for tachyons [9, 10].”
Haloes of k-essence (2005, background): “Therefore, causality in the propagation of the k-field means that signals propagate inside the light-cone of the metric h, and not g [39].”
Dynamical systems applied to cosmology: Dark energy and modified gravity (2017, background): “Applications of tachyonic scalar fields to late time cosmology were considered soon after they arose from high-energy physics (Padmanabhan, 2002; Gibbons, 2002, 2003; Bagla et al., 2003; Gorini et al., 2004).”
Carroll versus Newton and Galilei: two dual non-Einsteinian concepts of time (2014, background): “The Carroll group also emerges naturally in brane-dynamics in the limit that the brane world volume becomes lightlike [16, 17].”
Flat holography: aspects of the dual field theory (2016, background): “Appropriately modified versions of these theories have been speculated to be of use in tachyon cosmology [74].”
WMAP constraints on low redshift evolution of dark energy (2004, background): “…(Choudhury et al. 2002; Frolov, Kofman & Starobinsky 2002; Gibbons 2002; Padmanabhan 2002; Shiu & Wasserman 2002; Bagla, Jassal & Padmanabhan 2003; Gibbons 2003a; Jassal 2004; Kim, Kim & 2003; Sen 2003; Aguirregabiria & Lazkoz 2004; Gorini et al. 2004), phantom fields (Caldwell 2002; Carroll et…”