Persistent currents in toroidal dipolar supersolids
نویسندگان
چکیده
We investigate the rotational properties of a dipolar Bose-Einstein condensate trapped in toroidal geometry. Studying ground states rotating frame and at fixed angular momenta, we observe that acts distinctly different ways depending on whether it is superfluid or supersolid phase. find intriguingly, can support persistent current which occurs local minimum state energy as function momentum, where has vortex solution component condensate. The decay this prevented by barrier part consists fraction mimics solid-body rotation direction opposite to vortex. Furthermore, shows hysteretic behavior qualitatively
منابع مشابه
Characteristic Behavior of Toroidal Carbon Nanotubes Kinematics of Persistent Currents
The electrical properties of a carbon nanotube depend strongly on its lattice structure as defined by chiral and translational vectors. A toroidal shape for a nanotube allows various twisted structures to exist along the direction of the tube axis. We theoretically investigate the kinematics of conducting electrons and persistent currents in toroidal carbon nanotubes. We show that persistent cu...
متن کاملDielectric Metamaterials with Toroidal Dipolar Response
Alexey A. Basharin, Maria Kafesaki, Eleftherios N. Economou, Costas M. Soukoulis, Vassili A. Fedotov, Vassili Savinov, and Nikolay I. Zheludev Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology Hellas (FORTH), P.O. Box 1385, 71110 Heraklion, Crete, Greece National Research University “Moscow Power Engineering Institute,” 112250 Moscow, Russia Department o...
متن کاملPersistent Currents in Carbon Nanotubes
Persistent currents driven by a static magnetic flux parallel to the carbon nanotube axis are investigated. Owing to the hexagonal symmetry of graphene the Fermi contour expected for a 2D-lattice reduces to two points. However the electron or hole doping shifts the Fermi energy upwards or downwards and as a result, the shape of the Fermi surface changes. Such a hole doping leading to the Fermi ...
متن کاملPersistent currents in cold atoms
We propose a scheme to realize persistent mass and spin currents in cold atoms using optically generated gauge potentials. Two degenerate dark states can be created by coupling “tripod” atoms to three LaguerreGaussian laser beams carrying relative orbital angular momentum. Atoms in these dark states feel opposite effective magnetic fields of the flux-tube type and circulate in opposite directio...
متن کاملPersistent currents in spinor condensates.
We create and study persistent currents in a toroidal two-component Bose gas, consisting of 87Rb atoms in two different spin states. For a large spin-population imbalance we observe supercurrents persisting for over two minutes. However, we find that the supercurrent is unstable for spin polarization below a well-defined critical value. We also investigate the role of phase coherence between th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physreva.103.013313