Scissors mode of a rotating Bose-Einstein condensate

Abstract

A scissors mode of a rotating Bose-Einstein condensate is investigated both theoretically and experimentally. The condensate is confined in an axi-symmetric harmonic trap, superimposed with a small rotating deformation. For angular velocities larger than ${\omega }_{\perp }/\sqrt{2}$, where ${\omega }_{\perp }$ is the radial trap frequency, the frequency of the scissors mode is predicted to vanish like the square root of the deformation, due to the tendency of the system to exhibit spontaneous rotational symmetry breaking. Measurements of the frequency confirm the predictions of theory. Accompanying characteristic oscillations of the internal shape of the condensate are also calculated and observed experimentally.

4 pages, 4 figures, submitted to PRA Rapid Communication

References in corpus (8)

• Theory of Bose-Einstein condensation in trapped gases
• Collective excitations of a trapped Bose-condensed gas
• Stationary states of a rotating Bose-Einstein condensate: routes to vortex nucleation
• Observation of the scissors mode and superfluidity of a trapped Bose-Einstein condensed gas
• Dynamic instability of a rotating Bose-Einstein condensate
• Scissors mode and superfluidity of a trapped Bose-Einstein condensed gas
• Overcritical Rotation of a Trapped Bose-Einstein Condensate
• Finite-temperature simulations of the scissors mode in Bose-Einstein condensed gases

Cited by in corpus (11)

• Collective Excitation Interferometry with a Toroidal Bose-Einstein Condensate
• Observation of a superfluid Hall effect
• Collective excitation frequencies and stationary states of trapped dipolar Bose-Einstein condensates in the Thomas-Fermi regime
• The non-classical scissors mode of a vortex lattice in a Bose-Einstein condensate
• Groundstate and Collective Modes of a Spin-Polarized Dipolar Bose-Einstein Condensate in a Harmonic Trap
• Vortex Dynamics in Anisotropic Traps
• Gravity-induced resonances in a rotating trap
• Controlled creation of three-dimensional vortex structures in Bose--Einstein condensates using artificial magnetic fields
• Quantum Hall fractions in ultracold atomic vapors
• Scissors mode of trapped dipolar gases
• Anomalous isothermal compressibility in spin-orbit coupled degenerate Fermi gases