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

Adrian Dumitru·Ove Scavenius
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Abstract

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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Adrian Dumitru, Ove Scavenius. 2000-06-09. Nonlinear evolution of the momentum dependent condensates in strong interaction: the ``pseudoscalar laser''. https://doi.org/10.1103/physrevd.62.076004

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