Sub-Poissonian Fluctuations in a 1D Bose Gas: From the Quantum Quasicondensate to the Strongly Interacting Regime

2011/03/31 by Thibaut Jacqmin, T. Jacqmin, Julien Armijo +4 · 6 citations
Physics and Astronomy · #Atom (system on chip) #Bose gas #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electron #Fermi Gamma-ray Space Telescope #Fermi gas #Physics #Quantum #Quantum fluctuation #Quantum mechanics #Quantum, superfluid, helium dynamics #Strong Light-Matter Interactions #cond-mat.quant-gas #physics.atom-ph

paper · pdf · doi:10.1103/physrevlett.106.230405

published as Physical Review Letters 106 (2011) 230405

openalex publication_date 2011/06/10 · arxiv created 2011/06/22 · arxiv updated 2015/05/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report on local, in situ measurements of atom number fluctuations in slices of a one-dimensional Bose gas on an atom chip setup. By using current modulation techniques to prevent cloud fragmentation, we are able to probe the crossover from weak to strong interactions. For weak interactions, fluctuations go continuously from super- to sub-Poissonian as the density is increased, which is a signature of the transition between the subregimes where the two-body correlation function is dominated, respectively, by thermal and quantum contributions. At stronger interactions, the super-Poissonian region disappears, and the fluctuations go directly from Poissonian to sub-Poissonian, as expected for a "fermionized" gas.

Citations

• Direct Observation of a Sub-Poissonian Number Distribution of Atoms in an Optical Lattice
• Role of wire imperfections in micromagnetic traps for atoms
• Probing Three-Body Correlations in a Quantum Gas Using the Measurement of the Third Moment of Density Fluctuations
• Sub-Poissonian Atom-Number Fluctuations by Three-Body Loss in Mesoscopic Ensembles
• Probing the Superfluid to Mott Insulator Transition at the Single Atom Level
• Direct Observation of Sub-Poissonian Number Statistics in a Degenerate Bose Gas
• Spatial quantum noise interferometry in expanding ultracold atom clouds

Cited by

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• The properties of Tonks–Girardeau gas at finite temperature and comparison with spin-polarized fermions
• Exact Spectral Function of a Tonks-Girardeau Gas in a Lattice
• Long-lived nonthermal states realized by atom losses in one-dimensional quasicondensates
• Thermalization of a quantum Newton's cradle in a one-dimensional quasicondensate
• Exactly Solvable System of One-Dimensional Trapped Bosons with Short- and Long-Range Interactions