Collective excitations and tunneling dynamics in long bosonic Josephson junctions
arXiv:1906.05605 · doi:10.1103/PhysRevA.100.033601
Abstract
We investigate the low-energy dynamics of two coupled anisotropic Bose-Einstein condensates forming a long Josephson junction. The theoretical study is performed in the framework of the two-dimensional Gross-Pitaevskii equation and the Bogoliubov-de Gennes formalism. We analyze the excitation spectrum of the coupled Bose condensates and show how low-energy excitations of the condensates lead to multiple-frequency oscillations of the atomic populations in the two wells. This analysis generalizes the standard bosnic Josephson euqation approach. We also develop a one-dimensional hydrodynamic model of the coupled condensates, that is capable to reproduce the excitation spectrum and population dynamics of the system.
References in corpus (24)
- Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction
- Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates
- Numerical Solution of the Gross-Pitaevskii Equation for Bose-Einstein Condensation
- Classical bifurcation at the transition from Rabi to Josephson dynamics
- Macroscopic quantum self-trapping and Josephson oscillations of exciton-polaritons
- Collective oscillations of a 1D trapped Bose gas
- Josephson effect between trapped Bose-Einstein condensates
- The Gross-Pitaevskii Equation for Bose Particles in a Double Well Potential: Two Mode Models and Beyond
- Nonlinear Josephson-type oscillations of a driven, two-component Bose-Einstein condensate
- Josephson effect in fermionic superfluids across the BEC-BCS crossover
- Dynamics of a tunable superfluid junction
- Excitation spectroscopy of vortex states in dilute Bose-condensed gases
- Crossing Over from Attractive to Repulsive Interactions in a Tunneling Bosonic Josephson Junction
- The Josephson plasmon as a Bogoliubov quasiparticle
- Momentum-Space Josephson Effects
- Josephson plasma oscillations and the Gross-Pitaevskii equation: Bogoliubov approach vs two-mode model
- Tunneling, self-trapping and manipulation of higher modes of a BEC in a double well
- Two-mode effective interaction in a double-well condensate
- Sign of tunnel coupling in barrier-separated Bose-Einstein condensates and stability of double-ring systems
- Non-linear mixing of Bogoliubov modes in a bosonic Josephson junction
- Effective two-mode model in Bose-Einstein condensates versus Gross-Pitaevskii simulations
- Collective Excitations of Bose-Einstein Condensates in a Double-Well Potential
- Phonon-Josephson resonances in atomtronic circuits
- Transverse Josephson vortices and localized states in stacked Bose-Einstein condensates
Cited by in corpus (7)
- Josephson junction dynamics in a two-dimensional ultracold Bose gas
- Relaxation in an Extended Bosonic Josephson Junction
- Dynamics of thermalization of two tunnel-coupled one-dimensional quasicondensates
- Quantum fluctuations in atomic Josephson junctions: the role of dimensionality
- Dispersion relations and self-localization of quasiparticles in coupled elongated Bose-Einstein condensates
- Controlled acoustic-driven vortex transport in coupled superfluid rings
- Collective modes of two-species Bose-Einstein condensates in a Josephson junction barrier