Abstract
In this work quantum corrections to the classical evolution of a relativistic scalar condensate are studied. The problem is approached by means of two different perturbative approaches: the 2-particle-irreducible (2PI) effective action and the expansion in the self-coupling. In the weak coupling regime the decoherence of the classical state is observed. The corresponding timescale is identified with the quantum break-time.
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Kovtun, A., Zantedeschi, M. Breaking BEC. J. High Energ. Phys. 2020, 212 (2020). https://doi.org/10.1007/JHEP07(2020)212
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DOI: https://doi.org/10.1007/JHEP07(2020)212