Article (Scientific journals)
Statistical prethermalization in a randomly kicked many-body classical rotor system
KUNDU, Aritra; Nag, Tanay; Rajak, Atanu
2025In Physical Review. B, 112 (6)
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Keywords :
prethermalization; driven system; non diffusive transport; heat; random drive
Abstract :
[en] We explore the phenomena of prethermalization in a many-body classical system of rotors under aperiodic drives characterized by waiting time distribution (WTD), where the waiting time is defined as the time between two consecutive kicks. We consider here two types of aperiodic drives: random and quasiperiodic. We observe a short-lived pseudothermal regime with algebraic suppression of heating for the random drive where WTD has an infinite tail, as observed for Poisson and binomial kick sequences. On the other hand, quasiperiodic drive characterized by a WTD with a sharp cutoff, as observed for the Thue-Morse sequence of kicks, lead to a prethermal region where heating is exponentially suppressed. However, according to our observations, the exponential suppression of the heating rate can not be associated with the boundedness of the WTD. The kinetic energy growth is analyzed using an average surprise associated with the WTD quantifying the randomness of the drive. In all aperiodic drives we obtain the chaotic heating regime for late times; however, the diffusion constant gets renormalized by the average surprise of the WTD in comparison to the periodic case.
Research center :
DphysMs
Disciplines :
Physics
Author, co-author :
KUNDU, Aritra  ;  University of Luxembourg
Nag, Tanay ;  BITS Pilani-Hyderabad Campus
Rajak, Atanu;  Indian Institute of Technology
External co-authors :
no
Language :
English
Title :
Statistical prethermalization in a randomly kicked many-body classical rotor system
Original title :
[en] Statistical prethermalization in a randomly kicked many-body classical rotor system
Publication date :
2025
Journal title :
Physical Review. B
ISSN :
2469-9950
eISSN :
2469-9969
Publisher :
American Physical Society (APS)
Volume :
112
Issue :
6
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
FnR Project :
FNR17233877 - NDFluc - Non-diffusive Fluctuations, 2022 (01/03/2023-31/05/2026) - Aritra Kundu
Funders :
Fonds National de la Recherche Luxembourg
Indian Institute of Technology Hyderabad
NFSG
Funding number :
17233877
Funding text :
AK thank the Luxembouorgish National Fund FNR NDFluc 17233877 for supporting this work. A.R. is thankful to IIT Hyder- abad, India for Seed Grant SG/IITH/F337/2023-24/SG-175. T.N. acknowledges the NFSG NFSG/HYD/2023/H0911 from BITS Pilani.
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since 08 September 2025

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