Quench dynamics of an ultracold two-dimensional Bose gas
Authors: Comaron P., Larcher F., Dalfovo F., Proukakis N. P.
Autors Affiliation: Newcastle Univ, Joint Quantum Ctr Durham Newcastle, Sch Math Stat & Phys, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England; Univ Trento, INO CNR BEC Ctr, Via Sommar 14, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Trento, Italy
Abstract: 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 the dynamical scaling hypothesis at late-time dynamics. Specifically, we find in that regime the vortex number decaying in time as < N-v > proportional to t(-1), consistent with a dynamical critical exponent z approximate to 2 for both temperature and interaction quenches. Focusing on finite-size boxlike geometries, we demonstrate that such an observation is within current experimental reach.
Journal/Review: PHYSICAL REVIEW A
Volume: 100 (3) Pages from: 033618-1 to: 033618-10
More Information: We would like to thank C. Barenghi, T. Billam, T. Bland, J. Dalibard, J. Schmitt, Z. Hadzibabic, and A. Groszek for fruitful discussions. We acknowledge financial support from the Quantera ERA-NET cofund project NAQUAS through the Consiglio Nazionale delle Ricerche (F.D. and F.L.) and the Engineering and Physical Science Research Council, Grant No. EP/R043434/1 (P.C. and N.P.P.). We acknowledge the Engineering and Physical Science Research Council, Grant No. EP/L504828/1, for DTA support. This work is also supported by Provincia Autonoma di Trento.KeyWords: COARSENING DYNAMICS; TRANSITIONDOI: 10.1103/PhysRevA.100.033618Citations: 13data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-11-26References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here