Spontaneous emergence of angular momentum Josephson oscillations in coupled annular Bose-Einstein condensates

Abstract

We investigate the nonlinear dynamics of two coupled annular Bose-Einstein condensates (BECs). For certain values of the coupling strength the nonrotating ground state is unstable with respect to fluctuations in the higher angular momentum modes. The two branched Bogoliubov spectrum exhibits distinct regions of instability enabling one to selectively occupy certain angular momentum modes. For sufficiently long evolution times angular momentum Josephson oscillations spontaneously appear, breaking the initial chiral symmetry of the BECs.

References in corpus (5)

• Radio-frequency dressed state potentials for neutral atoms
• A ring trap for ultracold atoms
• Detecting phonons and persistent currents in toroidal Bose-Einstein condensates by means of pattern formation
• Manipulation of ultracold atoms in dressed adiabatic radio frequency potentials
• Breaking of Chiral Symmetry and Spontaneous Rotation in a Spinor Bose-Einstein Condensate

Cited by in corpus (24)

• Roadmap on Atomtronics: State of the art and perspective
• Time-Averaged Adiabatic Potentials: Versatile traps and waveguides for ultracold quantum gases
• Hypersonic Bose-Einstein Condensates in Accelerator Rings
• Rotational Fluxons of Bose-Einstein Condensates in Coplanar Double-Ring Traps
• Quantum simulations of the early universe
• Quantum dynamics of bosons in a two-ring ladder: dynamical algebra, vortex-like excitations and currents
• Persistent currents in Bose gases confined in annular traps
• Quantum rings for beginners II: Bosons versus fermions
• Mixtures of Bose gases confined in concentrically coupled annular traps
• Sign of tunnel coupling in barrier-separated Bose-Einstein condensates and stability of double-ring systems
• Tunneling of persistent currents in coupled ring-shaped Bose-Einstein condensates
• Josephson oscillation of a superfluid Fermi gas
• Symmetry breaking in interacting ring-shaped superflows of Bose-Einstein condensates
• Generation of Josephson vortices in stacked toroidal Bose-Einstein condensates
• Orbital angular momentum dynamics of Bose-Einstein condensates trapped in two stacked rings
• Persistent currents in ultracold gases
• Tunneling vortex dynamics in linearly coupled Bose-Hubbard rings
• Coherence and Josephson oscillations between two tunnel-coupled one-dimensional atomic quasicondensates at finite temperature
• Effects of Axial Vorticity in Elongated Mixtures of Bose-Einstein Condensates
• Spontaneous creation of non-zero angular momentum modes in tunnel-coupled two-dimensional degenerate Bose gases
• Acoustic analogue of Hawking radiation in quantized circular superflows of Bose-Einstein condensates
• Static properties of two linearly coupled discrete circuits
• Josephson vortices and persistent current in a double-ring supersolid system
• Josephson oscillations of chirality and identity in two-dimensional solitons in spin-orbit-coupled condensates