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Abstract:

We investigate a string model defined by a special plane-wave metric ds2= 2du dv - λ(u)x2du2 + dx 2 with λ, = k/u2 and k = const > 0. This metric is a Penrose limit of some cosmological, Dp-brane and fundamental string backgrounds. Remarkably, in Rosen coordinates the metric has a 'null cosmology' interpretation with flat spatial sections and scale factor which is a power of the light-cone time u. We show that: (i) this spacetime is a Lorentzian homogeneous space. In particular, it admits a boost isometry u′ = ℓu, v′ = ℓ-1v similar to Minkowski space, (ii) It is an exact solution of string theory when supplemented by a u-dependent dilaton such that the corresponding effective string coupling eφ(u) goes to zero at u = ∞ and at the singularity u = 0, reducing back-reaction effects, (iii) The classical string equations in this background become linear in the light-cone gauge and can be solved explicitly in terms of Bessel's functions, and thus the string model can be directly quantized. This allows one to address the issue of singularity at the string-theory level. We examine the propagation of first-quantized point-particle and string modes in this time-dependent background. Using an analytic continuation prescription we argue that the string propagation through the singularity can be smooth.

Registro:

Documento: Artículo
Título:Solvable model of strings in a time-dependent plane-wave background
Autor:Papadopoulos, G.; Russo, J.G.; Tseytlin, A.A.
Filiación:Department of Mathematics, King's College London, London WC2R 2LS, United Kingdom
Theory Division, CERN, Geneve, CH 1211, Switzerland
Departamento de Física, Universidad de Buenos Aires, Pab. I, 1428 Buenos Aires, Argentina
Theoretical Physics Group, Blackett Laboratory, Imperial College, London SW7 2BZ, United Kingdom
Smith Laboratory, Ohio State University, Columbus, OH 43210, United States
Lebedev Physics Institute, Moscow, Russian Federation
Año:2003
Volumen:20
Número:5
Página de inicio:969
Página de fin:1016
DOI: http://dx.doi.org/10.1088/0264-9381/20/5/313
Título revista:Classical and Quantum Gravity
Título revista abreviado:Classical Quantum Gravity
ISSN:02649381
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02649381_v20_n5_p969_Papadopoulos

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Citas:

---------- APA ----------
Papadopoulos, G., Russo, J.G. & Tseytlin, A.A. (2003) . Solvable model of strings in a time-dependent plane-wave background. Classical and Quantum Gravity, 20(5), 969-1016.
http://dx.doi.org/10.1088/0264-9381/20/5/313
---------- CHICAGO ----------
Papadopoulos, G., Russo, J.G., Tseytlin, A.A. "Solvable model of strings in a time-dependent plane-wave background" . Classical and Quantum Gravity 20, no. 5 (2003) : 969-1016.
http://dx.doi.org/10.1088/0264-9381/20/5/313
---------- MLA ----------
Papadopoulos, G., Russo, J.G., Tseytlin, A.A. "Solvable model of strings in a time-dependent plane-wave background" . Classical and Quantum Gravity, vol. 20, no. 5, 2003, pp. 969-1016.
http://dx.doi.org/10.1088/0264-9381/20/5/313
---------- VANCOUVER ----------
Papadopoulos, G., Russo, J.G., Tseytlin, A.A. Solvable model of strings in a time-dependent plane-wave background. Classical Quantum Gravity. 2003;20(5):969-1016.
http://dx.doi.org/10.1088/0264-9381/20/5/313