Time-Evolution of a Collective Meson Field by the Use of a Squeezed State

Abstract

A time-evolution of quantum meson fields is investigated in a linear sigma model by means of the time-dependent variational approach with a squeezed state. The chiral condensate, which is a mean field of the quantum meson fields, and quantum fluctuations around it are treated self-consistently in this approach. The attention is payed to the description of the relaxation process of the chiral condensate, where the energy stored in the mean field configuration flows to the fluctuation modes. It is shown that the quantum fluctuations play an important role to describe this relaxation process.

18 pages, 22 postscript figures, uses PTPTeX.sty

Cited by in corpus (4)

• Nonequilibrium chiral dynamics by the time dependent variational approach with squeezed states
• Quantum description for a chiral condensate disoriented in a certain direction in isospace
• Effects of mode-mode and isospin-isospin correlations on domain formation of disoriented chiral condensates
• Time-Evolution of Collective Meson Fields and Amplification of Quantum Meson Modes in Chiral Phase Transition