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Graceful exit in quantum string cosmology

M. Gasperini
(
- CERN
)
,
J. Maharana
(
- Bhubaneswar, Inst. Phys.
)
,
G. Veneziano
(
- CERN
)

Feb, 1996

15 pages

Published in:

Nucl.Phys.B 472 (1996) 349-360

e-Print:

hep-th/9602087 [hep-th]

DOI:

10.1016/0550-3213(96)00201-5

Report number:

CERN-TH-96-32,
IP-BBSR-96-9

View in:

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Abstract:

We write an O(d,d)-covariant Wheeler-De Witt equation in the (

d~2+1

)-dimensional minisuperspace of low-energy cosmological string backgrounds. We discuss explicit examples of transitions between two duality-related cosmological phases, and we find a finite quantum transition probability even when the two phases are classically separated by a curvature singularity. This quantum approach is completely free from operator ordering ambiguities as a consequence of the duality symmetries of the string effective action.

Note:

16 pages, LATEX. A complete collection of papers and references on the pre-big-bang scenario in string cosmology is available at the following internet address: http://www.to.infn.it/teorici/gasperini/ Reporto-no: CERN-TH/96-32

04.60.Kz
98.80.Cq
98.80.H
Quantum cosmology
Wheeler-De Witt equation
String cosmology
quantum cosmology: superspace
string model
Wheeler-DeWitt equation: solution
symmetry: O(N,N)

References(25)

Figures(0)

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,
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