Universality of fast quenches from the conformal perturbation theory

Anatoly Dymarsky, Michael Smolkin

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We consider global quantum quenches, a protocol when a continuous field theoretic system in the ground state is driven by a homogeneous time-dependent external interaction. When the typical inverse time scale of the interaction is much larger than all relevant scales except for the UV-cutoff the system’s response exhibits universal scaling behavior. We provide both qualitative and quantitative explanations of this universality and argue that physics of the response during and shortly after the quench is governed by the conformal perturbation theory around the UV fixed point. We proceed to calculate the response of one and two-point correlation functions confirming and generalizing universal scalings found previously. Finally, we discuss late time behavior after the quench and argue that all local quantities will equilibrate to their thermal values specified by an excess energy acquired by the system during the quench.

Original languageEnglish
Article number112
JournalJournal of High Energy Physics
Issue number1
StatePublished - Jan 1 2018

Bibliographical note

Publisher Copyright:
© 2018, The Author(s).


  • Conformal Field Theory
  • Field Theories in Higher Dimensions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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