Chiocchetta, Alessio, Gambassi, Andrea ORCID: 0000-0003-3450-6125, Diehl, Sebastian and Marino, Jamir (2017). Dynamical Crossovers in Prethermal Critical States. Phys. Rev. Lett., 118 (13). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

We study the prethermal dynamics of an interacting quantum field theory with an N-component order parameter and O(N) symmetry, suddenly quenched in the vicinity of a dynamical critical point. Depending on the initial conditions, the evolution of the order parameter, and of the response and correlation functions, can exhibit a temporal crossover between universal dynamical scaling regimes governed, respectively, by a quantum and a classical prethermal fixed point, as well as a crossover from a Gaussian to a non-Gaussian prethermal dynamical scaling. Together with a recent experiment, this suggests that quenches may be used in order to explore the rich variety of dynamical critical points occurring in the nonequilibrium dynamics of a quantum many-body system. We illustrate this fact by using a combination of renormalization group techniques and a nonperturbative large-N limit.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Chiocchetta, AlessioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gambassi, AndreaUNSPECIFIEDorcid.org/0000-0003-3450-6125UNSPECIFIED
Diehl, SebastianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marino, JamirUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-236214
DOI: 10.1103/PhysRevLett.118.135701
Journal or Publication Title: Phys. Rev. Lett.
Volume: 118
Number: 13
Date: 2017
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1079-7114
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
QUANTUM; RELAXATIONMultiple languages
Physics, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/23621

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