PreprintCC BY 4.0arXiv
Mass quench in interacting finite-size quantum field system
Abstract
In this work, we theoretically investigate the non-equilibrium evolution of the correlation functions of a quantum scalar field following a mass quantum quench in a finite-size system. The self-consistent equation for the Keldysh (statistical) correlation function is solved numerically in the one-loop approximation. A specific spatio-temporal effect is observed: at a point in time approximately equal to half the system size, the effective mass experiences a strong disturbance. It is shown that this effect is driven by the interference of counter-propagating wave fronts of fluctuations that propagate within the light cone and is induced by periodic boundary conditions.
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BibTeX
@misc{simonian2026mass,
title = {{Mass quench in interacting finite-size quantum field system}},
author = {Grachik A Simonian and Alexey G. Mikhaylenko and Andrew G. Semenov},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.12045},
eprint = {2610.12045},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.12045},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Mass quench in interacting finite-size quantum field system
AU - Grachik A Simonian
AU - Alexey G. Mikhaylenko
AU - Andrew G. Semenov
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.12045
UR - https://arxiv.org/abs/2610.12045
AB - In this work, we theoretically investigate the non-equilibrium evolution of the correlation functions of a quantum scalar field following a mass quantum quench in a finite-size system. The self-consistent equation for the Keldysh (statistical) correlation function is solved numerically in the one-loop approximation. A specific spatio-temporal effect is observed: at a point in time approximately equal to half the system size, the effective mass experiences a strong disturbance. It is shown that this effect is driven by the interference of counter-propagating wave fronts of fluctuations that propagate within the light cone and is induced by periodic boundary conditions.
ER -