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Non-perturbative Gravity, Hagedorn Bounce & CMB
Tirthabir Biswas, Robert Brandenberger, Anupam Mazumdar +1
In hep-th/0508194 it was shown how non-perturbative corrections to gravity can resolve the big bang singularity, leading to a bouncing universe. Depending on the scale of the non-p…
More on the Spectrum of Perturbations in String Gas Cosmology
Robert H. Brandenberger, Sugumi Kanno, Jiro Soda +5
String gas cosmology is rewritten in the Einstein frame. In an effective theory in which a gas of closed strings is coupled to a dilaton gravity background without any potential fo…
String Gas Cosmology and Structure Formation
Robert H. Brandenberger, Ali Nayeri, Subodh P. Patil +1
It has recently been shown that a Hagedorn phase of string gas cosmology may provide a causal mechanism for generating a nearly scale-invariant spectrum of scalar metric fluctuatio…
Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
Robert H. Brandenberger, Ali Nayeri, Subodh P. Patil +1
It has recently been shown that a Hagedorn phase of string gas cosmology can provide a causal mechanism for generating a nearly scale-invariant spectrum of scalar metric fluctuatio…