TY - CHAP
T1 - A new non-perturbative time-dependent string configuration
AU - Alexandre, J
A2 - Rajantie, A
A2 - Dauncey, P
A2 - Contaldi, C
A2 - Stoica, H
PY - 2007
Y1 - 2007
N2 - A time-dependent bosonic string configuration is discussed, in graviton and dilaton backgrounds, which leads to Weyl-symmetry beta-functions which are homogeneous in X-0, to any order in alpha'. As a consequence, a string reparametrization can always be implemented, such that beta functions can be cancelled, to any order in alpha'. This non-perturbative conformal invariance is valid for any target space dimension, and leads to a power law expanding Universe, for which the power vanishes if a specific relation between the dimension and dilaton amplitude holds. Finally, D = 4 is the minimum dimension (in the case of a spherical world sheet) for which this configuration is consistent with a Wick rotation in a Minkowski target space
AB - A time-dependent bosonic string configuration is discussed, in graviton and dilaton backgrounds, which leads to Weyl-symmetry beta-functions which are homogeneous in X-0, to any order in alpha'. As a consequence, a string reparametrization can always be implemented, such that beta functions can be cancelled, to any order in alpha'. This non-perturbative conformal invariance is valid for any target space dimension, and leads to a power law expanding Universe, for which the power vanishes if a specific relation between the dimension and dilaton amplitude holds. Finally, D = 4 is the minimum dimension (in the case of a spherical world sheet) for which this configuration is consistent with a Wick rotation in a Minkowski target space
UR - https://www.scopus.com/pages/publications/71849087870
M3 - Conference paper
SN - 0094-243X
VL - 957
T3 - AIP CONFERENCE PROCEEDINGS
SP - 289
EP - 292
BT - Particles, Strings, and Cosmology
PB - Amer Inst Physics
CY - MELVILLE
T2 - 13th International Symposium on Particles, Strings and Cosmology (PASCOS 2007)
Y2 - 1 January 2007
ER -