Null cosmological singularities and free strings

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.066005· OSTI ID:21409442

Narayan, K ^[1]

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1. Chennai Mathematical Institute, SIPCOT IT Park, Padur PO, Siruseri 603103 (India)

We continue exploring free strings in the background of null Kasner-like cosmological singularities, following K. Narayan, arXiv:0904.4532. We study the free string Schrodinger wave functional along the lines of K. Narayan, arXiv:0807.1517. We find the wave functional to be nonsingular in the vicinity of singularities whose Kasner exponents satisfy certain relations. We compare this with the description in other variables. We then study certain regulated versions of these singularities where the singular region is replaced by a substringy but nonsingular region and study the string spectra in these backgrounds. The string modes can again be solved for exactly, giving some insight into how string oscillator states get excited near the singularity.

• OSTI ID: 21409442
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPARATIVE EVALUATIONS
COMPOSITE MODELS
COSMOLOGICAL MODELS
ELECTRONIC EQUIPMENT
EQUIPMENT
EVALUATION
EXACT SOLUTIONS
EXTENDED PARTICLE MODEL
MATHEMATICAL MODELS
MATHEMATICAL SOLUTIONS
OSCILLATORS
PARTICLE MODELS
QUARK MODEL
SINGULARITY
SPECTRA
STRING MODELS