Details
| Original language | English |
|---|---|
| Pages (from-to) | 443-447 |
| Number of pages | 5 |
| Journal | Science (New York, N.Y.) |
| Volume | 382 |
| Issue number | 6669 |
| Publication status | Published - 27 Oct 2023 |
Abstract
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.
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In: Science (New York, N.Y.), Vol. 382, No. 6669, 27.10.2023, p. 443-447.
Research output: Contribution to journal › Article › Research › peer review
}
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 -