Nonlinear evolution of the momentum dependent condensates in strong interaction: the ``pseudoscalar laser''

Details Nonlinear evolution of the momentum dependent condensates in strong interaction: the ``pseudoscalar laser'' Nonlinear evolution of the momentum dependent condensates in strong interaction: the ``pseudoscalar laser''

2000-03-14

arxiv.org/abs/hep-ph/0003134v2

Phys.Rev. D62 (2000) 076004

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 Pages, REVTEX, 8 Figures; one reference and one figure added

Scientific paper

10.1103/PhysRevD.62.076004

We discuss the relaxation of the scalar and pseudoscalar condensates after a rapid quench from an initial state with fluctuations. If we include not only the zero-mode but also higher modes of the condensates in the classical evolution, we observe parametric amplification of those ``hard'' modes. Thus, they couple nonlinearly to the ``soft'' modes. As a consequence, domains of coherent pi-field emerge long after the initial spinodal decomposition. The momentum-space distribution of pions emerging from the decay of that momentum-dependent condensate is discussed.

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