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

Abstract:

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.

A. Schachner, A. Piñeiro Orioli, J. Berges: Universal scaling of unequal-time correlation
functions in ultracold Bose gases far from equilibrium, Phys. Rev. A 95 (2017) 053605

https://doi.org/10.1103/PhysRevA.95.053605

Related to Project A01, A02, A03, A04, A05, B03