Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-10-19
Phys.Rev. C73 (2006) 045212
Physics
Nuclear Physics
Nuclear Theory
10 pages, 11 figures; Correction of an error in Fig.1
Scientific paper
10.1103/PhysRevC.73.045212
The effects of mode-mode and isospin-isospin correlations on nonequilibrium chiral dynamics are investigated by using the method of the time dependent variational approach with squeezed states as trial states. Our numerical simulations show that large domains of the disoriented chiral condensate (DCC) are formed due to the combined effect of the mode-mode and isospin-isospin correlations. Moreover, it is found that, when the mode-mode correlation is included, the DCC domain formation is accompanied by the amplification of the quantum fluctuation, which implies the squeezing of the state. However, neither the DCC domain formation nor the amplification of the quantum fluctuation is observed if only the isospin-isospin correlation is included. This suggests that the mode-mode coupling plays a key role in the DCC domain formation.
Asakawa Masayuki
Ikezi Naoko
Tsue Yasuhiko
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