On quantum quenches at one loop

• Published in: The journal of high energy physics Vol. 2019; no. 1; pp. 1 - 22
• Main Authors: Goykhman, Mikhail, Shachar, Tom, Smolkin, Michael
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-01-2019; Springer Nature B.V; SpringerOpen
• Subjects: Classical and Quantum Gravitation; Conformal Field Theory; Effective Field Theories; Elementary Particles; Field theory; High energy physics; Nonperturbative Effects; Perturbation theory; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quantum theory; Regular Article - Theoretical Physics; Relativity Theory; Renormalization Group; String Theory; Renormalization Group; Effective Field Theories; Conformal Field Theory; Nonperturbative Effects
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP01(2019)022

A
bstract
We study global quenches in a number of interacting quantum field theory models away from the conformal regime. We conduct a perturbative renormalization at one-loop level and track the modifications of the quench protocol induced by the renormalization group flow. The scaling of various observables at early times is evaluated in the regime of rapid quench rates, with a particular emphasis placed on the leading order effects that cannot be recovered using the finite order conformal perturbation theory. We employ the canonical ideas of effective action to verify our results and discuss a potential route towards understanding the late time dynamics.