Adiabatically tuning quantized supercurrents in an annular Bose-Einstein condensate
arXiv:1705.00229 · doi:10.1103/PhysRevA.96.011603
Abstract
The ability to generate and tune quantized persistent supercurrents is crucial for building superconducting or atomtronic devices with novel functionalities. In ultracold atoms, previous methods for generating quantized supercurrents are generally based on dynamical processes to prepare atoms in metastable excited states. Here we show that arbitrary quantized circulation states can be adiabatically prepared and tuned as the ground state of a ring-shaped Bose-Einstein condensate by utilizing spin-orbital-angular-momentum (SOAM) coupling and an external potential. There exists superfluid hysteresis for tuning supercurrents between different quantization values with nonlinear atomic interactions, which is explained by developing a nonlinear Landau-Zener theory. Our work will provide a powerful platform for studying SOAM coupled ultracold atomic gases and building novel atomtronic circuits.
8 pages, 6 figures
References in corpus (12)
- Many-Body Physics with Ultracold Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
- Quench-induced supercurrents in an annular Bose gas
- Adiabatic Theory of Nonlinear Evolution of Quantum States
- Persistent currents in spinor condensates
- Dicke-type phase transition in a spin-orbit coupled Bose-Einstein condensate
- Spin - orbital-angular-momentum coupling in Bose-Einstein condensates
- Angular spin-orbit coupling in cold atoms
- Quantum phases of Bose-Einstein condensates with synthetic spin - orbital-angular-momentum coupling
- A superfluid 4He interferometer operating near 2 K
- Magnetic field dependence of Raman coupling in Alkali atoms
Cited by in corpus (9)
- Observation of quantum phase transition in spin-orbital-angular-momentum coupled Bose-Einstein condensate
- Ground-state phase diagram and excitation spectrum of a Bose-Einstein condensate with spin-orbital-angular-momentum coupling
- Spatially strongly confined atomic excitation via two dimensional stimulated Raman adiabatic passage
- Spin-orbital-angular-momentum-coupled quantum gases
- Fine structure of the stripe phase in ring-shaped Bose-Einstein condensates with spin-orbital-angular-momentum coupling
- Current production in ring condensates with a weak link
- Excitations of a supersolid annular stripe phase in a spin-orbital-angular-momentum-coupled spin-1 Bose-Einstein condensate
- Time-reversal-invariant spin-orbit-coupled bilayer Bose-Einstein Condensates
- Two atoms in a harmonic trap with spin-orbital-angular-momentum coupling