Energy-momentum tensor and definition of particle states for Robertson-Walker space-time

Journal Article · Fri Dec 15 00:00:00 EST 1978 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.18.4422· OSTI ID:6358108

Brown, M R; Dutton, C R

A new regularization scheme is developed for calculating expectation values of the energy-momentum tensor of a quantized scalar field in Robertson-Walker space-times. Using this regularized stress tensor we consider a definition for the vacuum state of the scalar field on any initial hypersurface. Asymptotic methods are developed to investigate the structure of both the divergent and finite terms of the stress tensor when evaluated in this state. The conformal anomaly is discussed in the context of this model. It does not naturally enter into the analysis and we argue that its inclusion is unnecessary.

• Research Organization: University of Texas at Austintin, Austin, Texas
• OSTI ID: 6358108
• Journal Information: Phys. Rev., D; (United States), Vol. 18:12
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
MASS RENORMALIZATION
SCALAR FIELDS
VACUUM STATES
ENERGY-MOMENTUM TENSOR
SPACE-TIME
RENORMALIZATION
TENSORS
657003* - Theoretical & Mathematical Physics- Relativity & Gravitation
645400 - High Energy Physics- Field Theory