Hydrodynamic attractor in periodically driven ultracold quantum gases

TL;DR

This paper reveals a new cyclic hydrodynamic attractor in ultracold quantum gases with oscillating expansion, extending the concept beyond monotonic systems and opening experimental possibilities.

Contribution

It introduces the concept of a cyclic hydrodynamic attractor in oscillating systems, expanding the understanding of hydrodynamic attractors beyond monotonic expansion.

Findings

Discovery of cyclic attractor behavior in oscillating ultracold gases

Potential for experimental observation in modulated quantum gases

Extension of hydrodynamic attractor theory to non-monotonic systems

Abstract

Hydrodynamic attractors are a universal phenomenon of strongly interacting systems that describe the hydrodynamic-like evolution far from local equilibrium. In particular, the rapid hydrodynamization of the Quark-Gluon Plasma is behind the remarkable success of hydrodynamic models of high-energy nuclear collisions. So far, hydrodynamic attractors have been explored only in systems undergoing monotonic expansion, such as Bjorken flow. We demonstrate that a system with an oscillating isotropic expansion exhibits a novel cyclic attractor behavior. This phenomenon can be investigated in ultracold quantum gases with externally modulated scattering length, offering a new avenue for experimentally discovering hydrodynamic attractors.