Rotational Fluxons of Bose-Einstein Condensates in Coplanar Double-Ring Traps

Abstract

Rotational analogs to magnetic fluxons in conventional Josephson junctions are predicted to emerge in the ground state of rotating tunnel-coupled annular Bose-Einstein condensates (BECs). Such topological condensate-phase structures can be manipulated by external potentials. We determine conditions for observing macroscopic quantum tunneling of a fluxon. Rotational fluxons in double-ring BECs can be created, manipulated, and controlled by external potential in different ways than possible in the solid state system, thus rendering them a promising new candidate system for studying and utilizing quantum properties of collective many-particle degrees of freedom.

4 pages, 3 figures. Text and references changed in response to editor's and reviewers' comments. Error in Eq. (1) corrected

References in corpus (7)

• Superconducting Circuits and Quantum Information
• Spontaneous vortices in the formation of Bose-Einstein condensates
• Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
• Radio-frequency dressed state potentials for neutral atoms
• Linear response theory for a pair of coupled one-dimensional condensates of interacting atoms
• Versatile two-dimensional potentials for ultra-cold atoms
• Creation of macroscopic quantum superposition states by a measurement

Cited by in corpus (8)

• Hidden vortices in a Bose-Einstein condensate in a rotating double-well potential
• Fate of the false vacuum: towards realization with ultra-cold atoms
• Oscillons in coupled Bose-Einstein condensates
• Persistent current oscillations in a double-ring quantum gas
• Generation of Josephson vortices in stacked toroidal Bose-Einstein condensates
• Symmetry breaking in interacting ring-shaped superflows of Bose-Einstein condensates
• Josephson vortices and persistent current in a double-ring supersolid system
• Dissipative Josephson vortices in annular polariton fluids