2019/05/31 by Paolo Comaron, Fabrizio Larcher, Franco Dalfovo +1 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.100.033618
published as Phys. Rev. A 100, 033618 (2019) · Main text: 9 pages, 4 figures + References
arxiv created 2019/10/03 · arxiv updated 2019/10/04
We study the dynamics of a two-dimensional Bose gas after an instantaneous quench of an initially ultracold thermal atomic gas across the Berezinskii-Kosterlitz-Thouless phase transition, confirming via stochastic simulations that the system undergoes phase ordering kinetics and fulfills dynamical scaling hypothesis at late-time dynamics. Specifically, we find in that regime the vortex number decaying in time as ⟨ Nv ∝ t-1⟩, consistent with a dynamical critical exponent z ≈ 2 for both temperature and interaction quenches. Focusing on finite-size box-like geometries, we demonstrate that such an observation is within current experimental reach.