QUANTUM EVOLUTION OF SCALAR FIELDS IN ROBERTSON-WALKER SPACE-TIME

Authors
REIS HC EBOLI OJP
Citation
Hc. Reis et Ojp. Eboli, QUANTUM EVOLUTION OF SCALAR FIELDS IN ROBERTSON-WALKER SPACE-TIME, International journal of modern physics A, 11(21), 1996, pp. 3957-3971
Citations number
33
Categorie Soggetti
Physics, Particles & Fields","Physics, Nuclear
Journal title
International journal of modern physics A → ACNP
ISSN journal
0217751X
Volume
11
Issue
21
Year of publication
1996
Pages
3957 - 3971
Database
ISI
SICI code
0217-751X(1996)11:21<3957:QEOSFI>2.0.ZU;2-V
Abstract
We study the lambda phi(4) field theory in a hat Robertson-Walker spac e-time using the functional Schrodinger picture. We introduce a simple Gaussian approximation to analyze the time evolution of pure states a nd we establish the renormalizability of the approximation. We also sh ow that the energy-momentum tensor in this approximation is finite onc e we consider the usual mass and coupling constant renormalizations.