Formation of caustics in Dirac-Born-Infeld type scalar field systems

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.103530· OSTI ID:21509917

Goswami, U D ^[1]; Nandan, H ^[2]; Sami, M ^[2]

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1. Department of Physics, Dibrugarh University, Dibrugarh 786004, Assam (India)
2. Center for Theoretical Physics, Jamia Millia Islamia, Jamia Nagar, New Delhi-110092 (India)

We investigate the formation of caustics in the Dirac-Born-Infeld type scalar field systems for generic classes of potentials, viz., massive rolling scalar with potential, V({phi})=V{sub 0}e{sup {+-}(1/2)M2{phi}2} and inverse power-law potentials with V({phi})=V{sub 0}/{phi}{sup n}, 0<n<2. It is found that in the case of exponentially decreasing rolling massive scalar field potential, there are multivalued regions and regions of likely to be caustics in the field configuration. However there are no caustics in the case of exponentially increasing potential. We show that the formation of caustics is inevitable for the inverse power-law potentials under consideration in Minkowski space time whereas caustics do not form in this case in the Friedmann-Robertson-Walker Universe.

• OSTI ID: 21509917
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 10; Other Information: DOI: 10.1103/PhysRevD.82.103530; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BORN-INFELD THEORY
CONFIGURATION
MINKOWSKI SPACE
ROLLING
SCALAR FIELDS
UNIVERSE
FABRICATION
MATERIALS WORKING
MATHEMATICAL SPACE
SPACE