Detecting Phase Coherence of 2D Bose Gases via Noise Correlations
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866908364970131456 |
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| author | Sunami, Shinichi Singh, Vijay P. Rydow, Erik Beregi, Abel Chang, En Mathey, Ludwig Foot, Christopher J. |
| author_facet | Sunami, Shinichi Singh, Vijay P. Rydow, Erik Beregi, Abel Chang, En Mathey, Ludwig Foot, Christopher J. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_03491 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Detecting Phase Coherence of 2D Bose Gases via Noise Correlations Sunami, Shinichi Singh, Vijay P. Rydow, Erik Beregi, Abel Chang, En Mathey, Ludwig Foot, Christopher J. Quantum Gases Atomic Physics 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. |
| title | Detecting Phase Coherence of 2D Bose Gases via Noise Correlations |
| topic | Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2406.03491 |