Solvable time-dependent model and rolling closed string tachyon

Journal Article · Wed Dec 15 00:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.126013· OSTI ID:20698302

Hikida, Yasuaki ^[1]; Takayanagi, Tadashi ^[2]

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1. School of Physics and BK-21 Physics Division, Seoul National University, Seoul 151-747 (Korea, Republic of)
2. Jefferson Physical Laboratory, Harvard University, Cambridge, Massachusetts 02138 (United States)

We investigate the SL(2,R)/U(1) WZW model with level 0<k<2 as a solvable time-dependent background in string theory. This model is expected to be dual to the one describing a rolling closed string tachyon with a timelike linear dilaton. We examine its exact metric and minisuperspace wave functions. Two point functions and the one-loop vacuum amplitude are computed and their relation to the closed string emission is discussed. Comparing with the results from the minisuperspace approximation, we find a physical interpretation of our choice to continue the Euclidean model into the Lorentzian one. Three point functions are also examined.

• OSTI ID: 20698302
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 12; Other Information: DOI: 10.1103/PhysRevD.70.126013; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
AXIOMATIC FIELD THEORY
CONFORMAL INVARIANCE
EMISSION
EUCLIDEAN SPACE
LORENTZ TRANSFORMATIONS
NONLINEAR PROBLEMS
SL GROUPS
STRING MODELS
SUPERSYMMETRY
TACHYONS
TIME DEPENDENCE
U-1 GROUPS
UNITARY SYMMETRY
WAVE FUNCTIONS