Symmetry-conserving vortex clusters in small rotating clouds of ultracold bosons
نویسندگان
چکیده
The properties of a special class of correlated many-body wave functions, named rotating vortex clusters RVCs , that preserve the total angular momentum of a small cloud of trapped rotating bosons are investigated. They have lower energy and provide a superior description for the formation of vortices compared to the mean-field Gross-Pitaevskii GP states that break the rotational symmetry. The GP vortex states are shown to be wave packets composed of such RVC states. Our results suggest that, for a small number of bosons, the physics is different from that of ideal Bose-Einstein condensates which characterize larger assemblies.
منابع مشابه
Wigner Molecules in Semiconductor Quantum Dots and Trapped Ultracold Bosonic Clouds
Strongly correlated phenomena associated with symmetry breaking in small finite-size systems will be reviewed [1], with a focus on the strongly correlated regime of electrons in two-dimensional semiconductor quantum dots (QDs; often referred to as artificial atoms and molecules) and trapped ultracold bosonic atoms in harmonic traps. The talk will emphasize universal aspects and similarities of ...
متن کاملSuppression of collapse for matter waves with orbital angular momentum
We explore the influence of the orbital angular momentum on the collapse of vortex-free elliptic clouds of Bose–Einstein condensates with a negative scattering length trapped in a radially symmetric harmonic potential. We show that the number of trapped ultracold atoms corresponding to the collapse threshold can be radically increased for such rotating nonlinear matter waves. Below the threshol...
متن کاملSymmetry breaking and quantum correlations
Investigations of emergent symmetry breaking phenomena occurring in small finite-size systems are reviewed, with a focus on the strongly correlated regime of electrons in twodimensional semiconductor quantum dots and trapped ultracold bosonic atoms in harmonic traps. Throughout the review we emphasize universal aspects and similarities of symmetry breaking found in these systems, as well as in ...
متن کاملFrom nodeless clouds and vortices to gray ring solitons and symmetry-broken states in two-dimensional polariton condensates.
We consider the existence, stability and dynamics of the nodeless state and fundamental nonlinear excitations, such as vortices, for a quasi-two-dimensional polariton condensate in the presence of pumping and nonlinear damping. We find a series of interesting features that can be directly contrasted to the case of the typically energy-conserving ultracold alkali-atom Bose-Einstein condensates (...
متن کاملBosonic molecules in rotating traps.
We present a variational many-body wave function for repelling bosons in rotating traps, focusing on rotational frequencies that do not lead to restriction to the lowest Landau level. This wave function incorporates correlations beyond the Gross-Pitaevskii (GP) mean-field approximation, and it describes rotating boson molecules (RBMs) made of localized bosons that form polygonal-ring-like cryst...
متن کامل