Hagedorn inflation of D-branes

Abel, Steven; Freese, Katherine; Kogan, Ian I.

doi:10.1088/1126-6708/2001/01/039

Cited by 23 publications

(23 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is of great interest to explore the possibility of finding a solution of these problems in the context of string theory, e.g. along the lines of the string-driven inflationary models of [21,22].…”

Section: Brane Gases In the Early Universementioning

confidence: 99%

Brane gases in the early Universe

2000

View full text Add to dashboard Cite

Over the past decade it has become clear that fundamental strings are not the only fundamental degrees of freedom in string theory. D-branes are also part of the spectrum of fundamental states. In this paper we explore some possible effects of D-branes on early Universe string cosmology, starting with two key assumptions: firstly that the initial state of the Universe corresponded to a dense, hot gas in which all degrees of freedom were in thermal equilibrium, and secondly that the topology of the background space admits one-cycles. We argue by t-duality that in this context the cosmological singularities are not present. We derive the equation of state of the brane gases and apply the results to suggest that, in an expanding background, the winding modes of fundamental strings will play the most important role at late times. In particular, we argue that the string winding modes will only allow four space-time dimensions to become large. The presence of brane winding modes with p > 1 may lead to a hierarchy in the sizes of the extra dimensions.

show abstract

Section: Brane Gases In the Early Universementioning

confidence: 99%

Brane gases in the early Universe

2000

View full text Add to dashboard Cite

show abstract

“…Certainly, once inflation starts, after a few e-folds our patch of spacetime has inflated sufficiently, that the "string era" becomes an irrelevant description and we enter/recover the conventional cosmology period of the standard model (see, e.g., [28]). That is to say, that GR and QFT, soon after the transition from the string era, should be recovered in the low energy limit.…”

Section: Introductionmentioning

confidence: 99%

What can WMAP tell us about the very early Universe? New physics as an explanation of the suppressed large scale power and running spectral index

Bastero-Gil

Freese²,

Mersini-Houghton

2003

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

The Wilkinson Microwave Anisotropy Probe microwave background data may be giving us clues about new physics at the transition from a "stringy" epoch of the universe to the standard Friedmann Robertson Walker description. Deviations on large angular scales of the data, as compared to theoretical expectations, as well as running of the spectral index of density perturbations, can be explained by new physics whose scale is set by the height of an inflationary potential. As examples of possible signatures for this new physics, we study the cosmic microwave background spectrum for two string inspired models: 1) modifications to the Friedmann equations and 2) velocity dependent potentials. The suppression of low "l" modes in the microwave background data arises due to the new physics. In addition, the spectral index is red (n < 1) on small scales and blue (n > 1) on large scales, in agreement with data.

show abstract

“…The Hagedorn concept of the limiting temperature appears in many different contexts, e.g., in the studies of non-linear Regge trajectories [29,30,31], strings [32,33,34], d-branes [35], and cosmology [36]. Moreover, a complete treatment of hadronic resonances, as suggested by Hagedorn already in the 1960s, is the basic ingredient of the successful models of hadron production in heavy-ion collisions at the RHIC energies [37,38].…”

mentioning

confidence: 99%

Update of the Hagedorn mass spectrum

2004

View full text Add to dashboard Cite

We present an update of the Hagedorn hypothesis of the exponential growth of the number of hadronic resonances with mass. We use the newest available experimental data for the non-strange mesons and baryons, as well as fill in some missing states according to the observation that the high-lying states form chiral multiplets. The results show, especially for the case of the mesons, that the Hagedorn growth continues with the increasing mass, with the new states lining up along the exponential growth.

show abstract

Hagedorn inflation of D-branes

Cited by 23 publications

References 21 publications

Brane gases in the early Universe

Brane gases in the early Universe

What can WMAP tell us about the very early Universe? New physics as an explanation of the suppressed large scale power and running spectral index

Update of the Hagedorn mass spectrum

Contact Info

Product

Resources

About