New solutions with accelerated expansion in string theory

Dodelson, Matthew; Dong, Xi; Silverstein, Eva; Torroba, Gonzalo

doi:10.1007/JHEP12(2014)050

Title: New solutions with accelerated expansion in string theory

Journal Article · Fri Dec 05 00:00:00 EST 2014 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP12(2014)050· OSTI ID:1120138

Dodelson, Matthew ^[1]; Dong, Xi ^[1]; Silverstein, Eva ^[2]; Torroba, Gonzalo ^[1]

Stanford Univ., Stanford, CA (United States)
Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Kavli Institute for Particle Astrophysics and Cosmology, Stanford, CA (United States)

We present concrete solutions with accelerated expansion in string theory, requiring a small, tractable list of stress energy sources. We explain how this construction (and others in progress) evades previous no go theorems for simple accelerating solutions. Our solutions respect an approximate scaling symmetry and realize discrete sequences of values for the equation of state, including one with an accumulation point at w = –1 and another accumulating near w = –1/3 from below. In another class of models, a density of defects generates scaling solutions with accelerated expansion. Here, we briefly discuss potential applications to dark energy phenomenology, and to holography for cosmology.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1120138

Report Number(s):: SLAC-PUB-15800; arXiv:1310.5297

Journal Information:: Journal of High Energy Physics (Online), Vol. 2014, Issue 12; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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Title: New solutions with accelerated expansion in string theory

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