On quantum quenches at one loop

Goykhman, Mikhail (0000 0004 1937 0538, The Racah Institute of Physics, The Hebrew University of Jerusalem, Sderot Magnes, Jerusalem, 91904, Israel) ; Shachar, Tom (0000 0004 1937 0538, The Racah Institute of Physics, The Hebrew University of Jerusalem, Sderot Magnes, Jerusalem, 91904, Israel) ; Smolkin, Michael (0000 0004 1937 0538, The Racah Institute of Physics, The Hebrew University of Jerusalem, Sderot Magnes, Jerusalem, 91904, Israel)

04 January 2019

Abstract: 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.


Published in: JHEP 1901 (2019) 022
Published by: Springer/SISSA
DOI: 10.1007/JHEP01(2019)022
arXiv: 1810.02258
License: CC-BY-4.0



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