TY - JOUR

T1 - Universal scaling of the dynamic BKT transition in quenched 2D Bose gases

AU - Sunami, Shinichi

AU - Singh, Vijay Pal

AU - Garrick, David

AU - Beregi, Abel

AU - Barker, Adam J.

AU - Luksch, Kathrin

AU - Bentine, Elliot

AU - Mathey, Ludwig

AU - Foot, Christopher J.

N1 - Funding Information: : The experimental work was supported by the EPSRC grant reference EP/S013105/1. S.S. acknowledges the Murata Overseas Scholarship Foundation, the Ezoe Memorial Recruit Foundation, the Daishin Foundation, and St. Hilda’s College, Oxford, for financial support. D.G., A.B., A.J.B., and K.L. thank the EPSRC for doctoral studentships. L.M. acknowledges funding by the Deutsche Forschungsgemeinschaft (DFG) in the framework of SFB 925 – project ID 170620586 and the excellence cluster “Advanced Imaging of Matter” – EXC 2056 – project ID 390715994. V.P.S. acknowledges funding by the Cluster of Excellence “QuantumFrontiers” – EXC 2123 – project ID 390837967

PY - 2023/10/27

Y1 - 2023/10/27

N2 - The understanding of nonequilibrium dynamics in many-body quantum systems is a fundamental issue in statistical physics. Experiments that probe universal properties of these systems can address such foundational questions. In this study, we report the measurement of universal dynamics triggered by a quench from the superfluid to normal phase across the Berezinskii-Kosterlitz-Thouless transition in a two-dimensional (2D) Bose gas. We reduced the density by splitting the 2D gas in two, realizing a quench across the critical point. The subsequent relaxation dynamics were probed with matter-wave interferometry to measure the local phase fluctuations. We show that the time evolution of both the phase correlation function and vortex density obeys universal scaling laws. This conclusion is supported by classical-field simulations and interpreted by means of real-time renormalization group theory.

AB - The understanding of nonequilibrium dynamics in many-body quantum systems is a fundamental issue in statistical physics. Experiments that probe universal properties of these systems can address such foundational questions. In this study, we report the measurement of universal dynamics triggered by a quench from the superfluid to normal phase across the Berezinskii-Kosterlitz-Thouless transition in a two-dimensional (2D) Bose gas. We reduced the density by splitting the 2D gas in two, realizing a quench across the critical point. The subsequent relaxation dynamics were probed with matter-wave interferometry to measure the local phase fluctuations. We show that the time evolution of both the phase correlation function and vortex density obeys universal scaling laws. This conclusion is supported by classical-field simulations and interpreted by means of real-time renormalization group theory.

UR - http://www.scopus.com/inward/record.url?scp=85175275462&partnerID=8YFLogxK

U2 - 10.48550/arXiv.2209.13587

DO - 10.48550/arXiv.2209.13587

M3 - Article

C2 - 37883542

AN - SCOPUS:85175275462

VL - 382

SP - 443

EP - 447

JO - Science (New York, N.Y.)

JF - Science (New York, N.Y.)

SN - 0036-8075

IS - 6669

ER -