Unraveling the nature of universal dynamics in O(N) theories

Abstrakti
Many-body quantum systems far from equilibrium can exhibit universal scaling dynamics which defy standard classification schemes. Here, we disentangle the dominant excitations in the universal dynamics of highly occupied N-component scalar systems using unequal-time correlators. While previous equal-time studies have conjectured the infrared properties to be universal for all N, we clearly identify for the first time two fundamentally different phenomena relevant at different N. We find all N >= 3 to be indeed dominated by the same Lorentzian "large-N" peak, whereas N = 1 is characterized instead by a non-Lorentzian peak with different properties, and for N = 2, we see a mixture of two contributions. Our results represent a crucial step toward obtaining a classification scheme of universality classes far from equilibrium.
Päätekijät
Aineistotyyppi
Artikkelit Tutkimusartikkeli
Julkaistu
2020
Sarja
Aiheet
Julkaisu tutkimustietojärjestelmässä
Julkaisija
American Physical Society
Julkaisun pysyvä osoite
https://urn.fi/URN:NBN:fi:jyu-202006033916Käytä tätä linkitykseen
Vertaisarvioinnin tila
Vertaisarvioitu
ISSN
2470-0010
DOI
https://doi.org/10.1103/PhysRevD.101.091902
Kieli
englanti
Julkaisussa
Physical Review D
Viite
Lisenssi
CC BY 4.0Open Access
Copyright© Authors, 2020

Jaa