173 citations · 876 across the 16 of their papers we have counts for
6 papers · 1 filter
On non-perturbative corrections to the Kahler potential
T. Barreiro, B. de Carlos, E. J. Copeland
We present the results of a detailed investigation into the consequences of adding specific string motivated non-perturbative corrections to the usual tree level Kahler potential i…
Graceful Exit in String Cosmology
Ram Brustein, Richard Madden
The graceful exit transition from a dilaton-driven inflationary phase to a decelerated Friedmann-Robertson-Walker era requires certain classical and quantum corrections to the stri…
Electrically Charged Sphalerons
P. M. Saffin, E. J. Copeland
We investigate the possibility that the Higgs sector of the Weinberg-Salam model admits the existence of electrically charged, sphaleron states. Evidence is provided through an asy…
Cosmology of the type IIB superstring
E. J. Copeland, James E. Lidsey, David Wands
The continuous and discrete symmetries of a dimensionally reduced type IIB superstring action are employed to generate four-dimensional cosmological solutions with non-trivial Neve…
Symmetries for generating string cosmologies
E. J. Copeland, James E. Lidsey, David Wands
We discuss the symmetry properties of the low-energy effective action of the type IIB superstring that may be employed to derive four-dimensional solutions. A truncated effective a…
Vacuum fluctuations in axion-dilaton cosmologies
E. J. Copeland, Richard Easther, David Wands
We study axion-dilaton cosmologies derived from the low-energy string effective action. We present the classical homogeneous Friedmann-Robertson-Walker solutions and derive the sem…