Amplification of Quantum Meson Modes in the Late Time of Chiral Phase Transition

Details Amplification of Quantum Meson Modes in the Late Time of Chiral Phase Transition Amplification of Quantum Meson Modes in the Late Time of Chiral Phase Transition

2004-11-12

arxiv.org/abs/hep-ph/0411162v1

Prog.Theor.Phys. 113 (2005) 369-384

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 16 figures

Scientific paper

10.1143/PTP.113.369

It is shown that there exists a possibility of amplification of amplitudes of quantum pion modes with low momenta in the late time of chiral phase transition by using the Gaussian wave functional approximation in the O(4) linear sigma model. It is also shown that the amplification occurs in the mechanism of the resonance by forced oscillation as well as the parametric resonance induced by the small oscillation of the chiral condensate. These mechanisms are investigated in both the case of spatially homogeneous system and the spatially expanded system described by the Bjorken coordinate.

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