Universal Scaling of the Dynamic BKT Transition in Quenched 2D Bose Gases
(2022)
Cavity optomechanics in a fiber cavity: the role of stimulated Brillouin scattering
New Journal of Physics IOP Publishing 24:9 (2022) 093023
Observation of the Berezinskii-Kosterlitz-Thouless transition in a two-dimensional Bose gas via matter-wave interferometry
Physical Review Letters American Physical Society 128:25 (2022) 250402
Abstract:
We probe local phase fluctuations of trapped two-dimensional (2D) Bose gases using matter-wave interferometry. This enables us to measure the phase correlation function, which changes from an algebraic to an exponential decay when the system crosses the Berezinskii-Kosterlitz-Thouless (BKT) transition. We determine the temperature dependence of the BKT exponent η and find the critical value ηc = 0.17(3) for our trapped system. Furthermore, we measure the local vortex density as a function of the local phase-space density, which shows a scale-invariant behaviour across the transition. Our experimental investigation is supported by Monte Carlo simulations and provides a comprehensive understanding of the BKT transition in a trapped system.Normalised Detection of Clock States by Cold Atom Recapture Method
Institute of Electrical and Electronics Engineers (IEEE) 00 (2022) 1-3
Quench dynamics of 2D Bose gases across the BKT critical point
(2022)