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Cited by 295

The DOI matches its Crossref record; 51 of the 51 references it cites were found in a registry or an index.

Probing the early universe with inflationary gravitational waves

Open access
Boyle, Latham A., Steinhardt, Paul J.·2008·Physical Review D
DOI 10.1103/physrevd.77.063504
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Abstract

Near comoving wave number $k$, the gravitational-wave background (GWB) from inflation carries information about the physical conditions near two moments in cosmic history: the moment when $k$ ``left the horizon'' during inflation, and the moment when it ``re-entered the horizon'' after inflation. We investigate the extent to which this information can be extracted if the GWB is measured by a combination of cosmic-microwave-background polarization experiments on large scales and space-based laser-interferometer experiments on small scales. To disentangle this information, we derive a new gravitational-wave transfer function that incorporates a number of physical effects that were treated less accurately, less generally, or were missing altogether in previous treatments. In particular, it incorporates: (i) dark energy with time-varying equation of state $w(z)$; (ii) tensor anisotropic stress due to free-streaming relativistic particles in the early universe; and (iii) a variety of physical effects that cause deviations from the standard equation of state $w=1/3$ during the radiation era. Based on this transfer function, we consider the degree to which the GWB can be used to test inflation and to probe the ``primordial dark age'' between the end of inflation and the electroweak phase transition.

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Metadata

Authors
Boyle, L. A., & Steinhardt, P. J.
Venue
Physical Review D
Publisher
American Physical Society (APS)
Published
2008-03-05
Volume
77
Issue
6
ISSN
  • 0556-2821 (ISSN-L)
  • 1550-7998
  • 1550-2368
DOI
10.1103/physrevd.77.063504
OpenAlex
W2094471106
Cited by
295
References
51
FWCI
6.68
Type
journal article
Language
en
Open access
green

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