Universal scaling of unequal-time correlation functions in ultracold Bose gases far from equilibrium

Schachner, Andreas; Orioli, Asier Piñeiro; Berges, Jürgen

Universal scaling of unequal-time correlation functions in ultracold Bose gases far from equilibrium

Authors

Schachner, Andreas

Orioli, Asier Piñeiro

Berges, Jürgen

Publisher

American Physical Society (APS)
Dept of Applied Mathematics & Theoretical Physics Student
https://doi.org/10.1103/physreva.95.053605

Description

We explore the far-from-equilibrium dynamics of Bose gases in a universal regime associated to nonthermal fixed points. While previous investigations concentrated on scaling functions and exponents describing equal-time correlations, we compute the additional scaling functions and dynamic exponent z characterizing the frequency dependence or dispersion from unequal-time correlations. This allows us to compare the characteristic condensation and correlation times from a finite-size scaling analysis depending on the system's volume.