Duration of classicality of an inhomogeneous quantum field with repulsive contact self-interactions

Arza, Ariel; Chakrabarty, Sankha S.; Enomoto, Seishi; Han, Yaqi; Todarello, Elisa

doi:10.1103/PhysRevD.100.125010

Title: Duration of classicality of an inhomogeneous quantum field with repulsive contact self-interactions

Journal Article · Wed Dec 11 00:00:00 EST 2019 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.100.125010· OSTI ID:1579291

Arza, Ariel; Chakrabarty, Sankha S.;

; Han, Yaqi;

Quantum fields with large degeneracy are often approximated as classical fields. Here, we show how the quantum and classical evolution of a highly degenerate quantum field with repulsive contact self-interactions differ from each other. Initially, the field is taken to be homogeneous except for a small plane-wave perturbation in only one mode. In quantum field theory, modes satisfying both momentum and energy conservation of the quasiparticles, grow exponentially with time. However, in the classical field approximation, the system is stable. We calculate the time scale after which the classical field description becomes invalid.

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Research Organization:: Univ. of Florida, Gainesville, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Heising-Simons Foundation; Chilean Commission on Research, Science and Technology (CONICYT); Japan Society for the Promotion of Science (JSPS); European Unions Horizon 2020

Grant/Contract Number:: SC0010296; 2015-109; 78180100; JP18H03708; JP17H01131; 674896

OSTI ID:: 1579291

Alternate ID(s):: OSTI ID: 1802078

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 100 Journal Issue: 12; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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