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Title: Quantum fluctuations on domain walls, strings, and vacuum bubbles
Author: Garriga Torres, Jaume
Vilenkin, A. (Alexander)
Keywords: Partícules (Física nuclear)
Teoria quàntica de camps
Fluctuacions (Física)
Pertorbació (Astronomia)
Particles (Nuclear physics)
Quantum field theory
Fluctuations (Physics)
Perturbation (Astronomy)
Issue Date: 1992
Publisher: The American Physical Society
Abstract: We develop a covariant quantum theory of fluctuations on vacuum domain walls and strings. The fluctuations are described by a scalar field defined on the classical world sheet of the defects. We consider the following cases: straight strings and planar walls in flat space, true vacuum bubbles nucleating in false vacuum, and strings and walls nucleating during inflation. The quantum state for the perturbations is constructed so that it respects the original symmetries of the classical solution. In particular, for the case of vacuum bubbles and nucleating strings and walls, the geometry of the world sheet is that of a lower-dimensional de Sitter space, and the problem reduces to the quantization of a scalar field of tachyonic mass in de Sitter space. In all cases, the root-mean-squared fluctuation is evaluated in detail, and the physical implications are briefly discussed.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review D, 1992, vol. 45, núm. 10, p. 3469-3486
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ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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