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In situ imaging of the thermal de Broglie wavelength in an ultracold Bose gas

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arxiv 2411.08779 v1 pith:BUZ3KW32 submitted 2024-11-13 cond-mat.quant-gas physics.atom-phquant-ph

Jinggang Xiang , Enid Cruz-Colón , Candice C. Chua , William R. Milner , Julius de Hond , Jacob F. Fricke , Wolfgang Ketterle This is my paper · ORCID
classification cond-mat.quant-gasphysics.atom-phquant-ph
keywords situthermalbrogliecorrelationsimagingultracoldwavelengthapplied
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abstract

We report the first in situ observation of density fluctuations on the scale of the thermal de Broglie wavelength in an ultracold gas of bosons. Bunching of $^{87}$Rb atoms in a quasi two-dimensional system is observed by single-atom imaging using a quantum gas microscope. Compared to a classical ensemble, we observe a 30 percent enhancement of the second-order correlation function. We show the spatial and thermal dependence of these correlations. The reported method of detecting in situ correlations can be applied to interacting many-body systems and to the study of critical phenomena near phase transitions.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fluctuation thermometry of an atom-resolved quantum gas: Beyond the fluctuation-dissipation theorem

    cond-mat.quant-gas 2025-02 conditional novelty 6.0 of 10

    Number-fluctuation thermometry based on the exact density correlation function extracts global and local temperatures of a quasi-2D ideal Fermi gas from single-atom-resolved images, without invoking the fluctuation-di...

  2. Nuclear Physics Confronts Relativistic Collisions Of Isobars

    nucl-ex 2025-07 conditional novelty 5.0 of 10

    RHIC isobar data are explained by different shapes of 96Ru and 96Zr, with 96Zr showing a large octupole deformation, so nuclear structure uncertainty, not the magnetic field, dominates the observed ratios.

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