Local atom-number fluctuations in quantum gases at finite temperature
arXiv:1102.3805 · doi:10.1103/PhysRevA.84.033612
Abstract
We investigate the number fluctuations in small cells of quantum gases pointing out important deviations from the thermodynamic limit fixed by the isothermal compressibility. Both quantum and thermal fluctuations in weakly as well as highly compressible fluids are considered. For the two-dimensional (2D) superfluid Bose gas we find a significant quenching of fluctuations with respect to the thermodynamic limit, in agreement with recent experimental findings. An enhancement of the thermal fluctuations is instead predicted for the 2D dipolar superfluid Bose gas, which becomes dramatic when the size of the sample cell is of the order of the wavelength of the rotonic excitation induced by the interaction.
arXiv comment6 pages, 5 figures
References in corpus (19)
- Roton-maxon spectrum and stability of trapped dipolar condensates
- Spatial quantum noise interferometry in expanding ultracold atom clouds
- Strong dipolar effects in a quantum ferrofluid
- Camparison of the Hanbury Brown-Twiss effect for bosons and fermions
- Hanbury Brown Twiss effect for ultracold quantum gases
- Observation of scale invariance and universality in two-dimensional Bose gases
- Free fermion antibunching in a degenerate atomic Fermi gas released from an optical lattice
- Observations of density fluctuations in an elongated Bose gas: ideal gas and quasi-condensate regimes
- Sub-Poissonian fluctuations in a 1D Bose gas: from the quantum quasi-condensate to the strongly interacting regime
- Observation of Feshbach resonances in an ultracold gas of Cr
- Probing three-body correlations in a quantum gas using the measurement of the third moment of density fluctuations
- Anomalous fluctuations of the condensate in interacting Bose gases
- Observation of the Presuperfluid Regime in a Two-Dimensional Bose Gas
- Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas
- Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas
- Universal Thermometry for Quantum Simulation
- Hybrid multi-site excitations in dipolar condensates in optical lattices
- Spin fluctuations, susceptibility and the dipole oscillation of a nearly ferromagnetic Fermi gas
- Number fluctuations in cold quantum gases
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- Dipolar physics: A review of experiments with magnetic quantum gases
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- Area law and its violation: A microscopic inspection into the structure of entanglement and fluctuations
- Density Fluctuations across the Superfluid-Supersolid Phase Transition in a Dipolar Quantum Gas
- Bose-Einstein condensation with spin-orbit coupling
- Roton excitations in a trapped dipolar Bose-Einstein condensate
- Fingerprinting Rotons in a Dipolar Condensate: Super-Poissonian Peak in the Atom-Number Fluctuations
- Full counting statistics and large deviations in thermal 1D Bose gas
- Direct observation of quantum phonon fluctuations in a one dimensional Bose gas
- Entanglement contour perspective for strong area law violation in a disordered long-range hopping model
- Thermodynamics vs. local density fluctuations in the metal/Mott-insulator crossover
- Non-local order in Mott insulators, Duality and Wilson Loops
- Excitations and number fluctuations in an elongated dipolar Bose-Einstein condensate
- Vortices in nonequilibrium photon condensates
- Compressibility and speeds of sound across the superfluid to supersolid phase transition of an elongated dipolar gas
- Static structure factors for a spin-1 Bose-Einstein condensate
- Microscopic model of the doping dependence of line widths in monolayer transition metal dichalcogenides
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- Phase-induced transport in atomic gases: from superfluid to Mott insulator
- Enhanced quantum spin fluctuations in a binary Bose-Einstein condensate
- Anisotropic Coherence properties in a trapped quasi2D dipolar gas
- Number Fluctuations of a Dipolar Condensate: Anisotropy and Slow Approach to the Thermodynamic Regime
- Quantum supremacy of the many-body fluctuations in the occupations of the excited particle states in a Bose-Einstein-condensed gas
- Scaling of Fluctuations in a Trapped Binary Condensate
- Fluctuations of spinor Bose-Einstein condensates
- Counting statistics in finite Fermi systems: illustrations with the atomic nucleus
- Roton in a few-body dipolar system
- Finite resolution fluctuation measurements of a trapped Bose-Einstein condensate
- Interferometric Measurement of Local Spin-Fluctuations in a Quantum Gas