Bose-Einstein condensation in dark power-law laser traps

Abstract

We investigate theoretically an original route to achieve Bose-Einstein condensation using dark power-law laser traps. We propose to create such traps with two crossing blue-detuned Laguerre-Gaussian optical beams. Controlling their azimuthal order $\ell$ allows for the exploration of a multitude of power-law trapping situations in one, two and three dimensions, ranging from the usual harmonic trap to an almost square-well potential, in which a quasi-homogeneous Bose gas can be formed. The usual cigar-shaped and disk-shaped Bose-Einstein condensates obtained in a 1D or 2D harmonic trap take the generic form of a "finger" or of a "hockey puck" in such Laguerre-Gaussian traps. In addition, for a fixed atom number, higher transition temperatures are obtained in such configurations when compared with a harmonic trap of same volume. This effect, which results in a substantial acceleration of the condensation dynamics, requires a better but still reasonable focusing of the Laguerre-Gaussian beams.

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• Synthesizing Lattice Structure in Phase Space
• Levitated Optomechanics with Meta-Atoms
• Dipole-Induced Electromagnetic Transparency
• Interaction of atom with non-paraxial Laguerre-Gaussian beam:Forming superposition of vortex states in Bose-Einstein condensates
• Fermi-Bose mixture in mixed dimensions
• The Condensation of Ideal Dunkl-Bose Gas in Power-Law Traps
• Quench dynamics of Bose-Einstein condensates in boxlike traps
• The key role of off-axis singularities in free-space vortex transmutation
• Linked and knotted synthetic magnetic fields
• The optical manipulation of matter-wave vortices: An analogue of circular dichroism
• Conditions for order and chaos in the dynamics of a trapped Bose-Einstein condensate in coordinate and energy space
• Dipolar Bose gas in highly anharmonic traps
• Cold Bose Atoms Around the Crossing of Quantum Waveguides
• Diffractive focusing of a uniform Bose-Einstein condensate
• Phase Space Evolution and Discontinuous Schrödinger Waves
• Families of localized modes of Bose-Einstein condensates enabled by incommensurate optical lattice and photon-atom interactions