Stringy Toda cosmologies

Journal Article · Sat Mar 01 00:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.3394· OSTI ID:517010

Kaloper, N ^[1]

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1. Department of Physics, McGill University, Montreal, Quebec, H3A 2T8 (CANADA)

We discuss a particular stringy modular cosmology with two axion fields in seven space-time dimensions, decomposable as a time and two flat three-spaces. The effective equations of motion for the problem are those of the SU(3) Toda molecule and, hence, are integrable. We write down the solutions, and show that all of them are singular. They can be thought of as a generalization of the pre-big-bang cosmology with excited internal degrees of freedom, and still suffering from the graceful exit problem. Some of the solutions, however, show a rather unexpected property: some of their spatial sections shrink to a point in spite of winding modes wrapped around them. We also comment how more general, anisotropic solutions, with fewer Killing symmetries, can be obtained with the help of STU dualities. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 517010
• Journal Information: Physical Review, D, Vol. 55, Issue 6; Other Information: PBD: Mar 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COSMOLOGY
STRING MODELS
SPACE-TIME
EQUATIONS OF MOTION
SU-3 GROUPS
ANISOTROPY
DUALITY