Visualization of Dimensional Effects in Collective Excitations of Optically Trapped Quasi-Two-Dimensional Bose Gases

Abstract

We analyze the macroscopic dynamics of a Bose gas axially confined in an optical lattice with a superimposed harmonic trap, taking into account weak tunneling effect. Our results show that upon transition to the quasi-two-dimensional (2D) regime of the trapped gas, the 3D equation of state and equilibrium density profile acquire corrections from 2D many-body effects. The corresponding frequency shift in the transverse breathing mode is accessible within current facilities, suggesting a direct observation of dimensional effects. Comparisons with other relevant effects are also presented.

4 pages, 1 figure

References in corpus (6)

• Many-Body Physics with Ultracold Gases
• Observation of scale invariance and universality in two-dimensional Bose gases
• Precision Measurements of Collective Oscillations in the BEC-BCS Crossover
• An Example of Quantum Anomaly in the Physics of Ultra-Cold Gases
• Quantum fluctuations and collective oscillations of a Bose-Einstein condensate in a 2D optical lattice
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• Universal Properties of Anisotropic Dipolar Bosons in Two Dimensions
• Probing Sound Speed of an Optically-Trapped Bose Gas with Periodically Modulated Interactions by Bragg Spectroscopy
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