Detecting Phase Coherence of 2D Bose Gases via Noise Correlations
arXiv:2406.03491 · doi:10.1103/PhysRevLett.134.183407
Abstract
We measure the noise correlations of two-dimensional (2D) Bose gases after free expansion, and use them to characterize the in-situ phase coherence across the Berezinskii-Kosterlitz-Thouless (BKT) transition. The noise-correlation function features a characteristic spatial oscillatory behavior in the superfluid phase, which gives direct access to the superfluid exponent. This oscillatory behavior vanishes above the BKT critical point, as we demonstrate for both single-layer and decoupled bilayer 2D Bose gases. Our work establishes noise interferometry as an important general tool to probe and identify many-body states of quantum gases, extending its application to previously inaccessible correlation properties in multimode systems.
References in corpus (29)
- Relaxation and Pre-thermalization in an Isolated Quantum System
- Berezinskii-Kosterlitz-Thouless Crossover in a Trapped Atomic Gas
- Spatial quantum noise interferometry in expanding ultracold atom clouds
- Observation of Phase Fluctuations in Bose-Einstein Condensates
- Free fermion antibunching in a degenerate atomic Fermi gas released from an optical lattice
- Critical Point of a Weakly Interacting Two-Dimensional Bose Gas
- Weakly Interacting, Dilute Bose Gases in 2D
- Two-point density correlations of quasicondensates in free expansion
- Kosterlitz-Thouless behavior in layered superconductors: the role of the vortex-core energy
- Hanbury Brown and Twiss correlations across the Bose-Einstein condensation threshold
- Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas
- Confinement of Half-quantized Vortices in Coherently Coupled Bose-Einstein Condensates: Simulating Quark Confinement in QCD
- Semiclassical theory of the quasi two-dimensional trapped Bose gas
- Ultracold atoms in multiple-radiofrequency dressed adiabatic potentials
- Probing Phase Fluctuations in a 2D Degenerate Bose Gas by Free Expansion
- Observation of the BKT Transition in a 2D Bose Gas via Matter-Wave Interferometry
- Trapping atoms with radio-frequency adiabatic potentials
- Universal Scaling of the Dynamic BKT Transition in Quenched 2D Bose Gases
- The Hong-Ou-Mandel effect with atoms
- Phase coherence of pairs of Cooper pairs as quasi-long-range order of half-vortex pairs in a two-dimensional bilayer system
- Phase-locking transition of coupled low-dimensional superfluids
- BKT-paired phase in coupled XY models
- Coherent splitting of two-dimensional Bose gases in magnetic potentials
- Coherence and Josephson oscillations between two tunnel-coupled one-dimensional atomic quasicondensates at finite temperature
- Realising a species-selective double well with multiple-radiofrequency-dressed potentials
- Probing multiple-frequency atom-photon interactions with ultracold atoms
- Berezinskii-Kosterlitz-Thouless phase transition with Rabi-coupled bosons
- Noise correlations of two-dimensional Bose gases
- Inelastic collisions in radiofrequency-dressed mixtures of ultracold atoms