Interference of longitudinal and transversal fragmentations in the Josephson tunneling dynamics of Bose-Einstein condensates
arXiv:2207.05513 · doi:10.1088/1367-2630/ada0d3
Abstract
The dynamics of bosons in Josephson junctions have drawn much attention where the bosons are initially condensed. When interacting bosons tunnel back and forth along the junction, depletion and eventually fragmentation develop. Here, we pose the question how do fragmented bosons tunnel in a bosonic Josephson junction? To this end, we exploit the transverse degree-of-freedom of the junction to encode initial fragmentation to the bosonic cloud. We analyze the survival probability along the junction, fluctuations of particle positions across the junction, and the occupancy of the lowest single-particle states. The dynamics found is rich and includes the speed up of the collapse of density oscillations and slow down of the revival process. It is found that a fully fragmented state significantly accelerates the revival process compared to the conventional Bose-Einstein condensate. To explain the underlying many-body mechanism, we show that the initial fragmentation in the transverse direction interferes with the development of fragmentation in time along the junction. The dynamics of occupation in the first excited single-particle state defines whether interference of fragmentations occurs in the junction. The interference mechanism is a purely many-body effect that does not occur in the mean-field dynamics. All in all, we show that the interference of longitudinal and transversal fragmentations leads to new rules for macroscopic tunneling phenomena of interacting bosons in traps.
References in corpus (52)
- Many-Body Physics with Ultracold Gases
- Theory of Bose-Einstein condensation in trapped gases
- Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction
- Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates
- Matter-wave interferometry in a double well on an atom chip
- Classical bifurcation at the transition from Rabi to Josephson dynamics
- The multi-configurational time-dependent Hartree method for bosons: Many-body dynamics of bosonic systems
- Macroscopic quantum self-trapping and Josephson oscillations of exciton-polaritons
- Bosons in cigar-shape traps: Thomas-Fermi regime, Tonks-Girardeau regime, and between
- Fragmentation of Bose-Einstein Condensates
- Role of excited states in the splitting dynamics of interacting Bose-Einstein condensates when ramping-up a barrier
- Spatial fragmentation of a Bose-Einstein condensate in a double-well potential
- Radio-frequency dressed state potentials for neutral atoms
- Exact quantum dynamics of a bosonic Josephson junction
- Josephson effect in fermionic superfluids across the BEC-BCS crossover
- Multiconfigurational time-dependent Hartree approaches for indistinguishable particles
- Atomtronic circuits: from many-body physics to quantum technologies
- The Multi-Layer Multi-Configuration Time-Dependent Hartree Method for Bosons: Theory, Implementation and Applications
- Quench Dynamics and Orthogonality Catastrophe of Bose Polarons
- Non-Equilibrium Quantum Dynamics of Ultra-Cold Atomic Mixtures: the Multi-Layer Multi-Configuration Time-Dependent Hartree Method for Bosons
- Crossing Over from Attractive to Repulsive Interactions in a Tunneling Bosonic Josephson Junction
- Connecting dissipation and phase slips in a Josephson junction between fermionic superfluids
- Fragmented Superradiance of a Bose-Einstein Condensate in an Optical Cavity
- Fragmented many-body ground states for scalar bosons in a single trap
- Parametric Excitation of a Bose-Einstein Condensate: From Faraday Waves to Granulation
- Condensate fragmentation as a sensitive measure of the quantum many-body behavior of bosons with long-range interactions
- Fate of a Bose-Einstein Condensate in the Presence of Spin-Orbit Coupling
- Ground state fragmentation of repulsive BEC in double-trap potentials
- Superfluid to Mott-insulator transition in Bose-Hubbard models
- Variance as a sensitive probe of correlations enduring the infinite particle limit
- Unraveling the Structure of Ultracold Mesoscopic Molecular Ions
- Critical transport and vortex dynamics in a thin atomic Josephson junction
- Production and characterization of a fragmented spinor Bose-Einstein condensate
- Two trapped particles interacting by a finite-ranged two-body potential in two spatial dimensions
- Momentum-Space Josephson Effects
- Josephson plasma oscillations and the Gross-Pitaevskii equation: Bogoliubov approach vs two-mode model
- Effective-interaction approach to the many-boson problem
- Revealing single-trap condensate fragmentation by measuring density-density correlations after time of flight
- Correlated Tunneling Dynamics of an Ultracold Fermi-Fermi Mixture Confined in a Double-Well
- Entanglement induced interactions in binary mixtures
- Self-consistent many-body metrology
- Detecting One-Dimensional Dipolar Bosonic Crystal Orders via Full Distribution Functions
- Entanglement-assisted tunneling dynamics of impurities in a double well immersed in a bath of lattice trapped bosons
- Bogoliubov depletion of the fragmented condensate in the bosonic flux ladder
- Quantum tunneling of a vortex between two pinning potentials
- Fragmentation and correlations in a rotating Bose-Einstein condensate undergoing breakup
- Impact of the transverse direction on the many-body tunneling dynamics in a two-dimensional bosonic Josephson junction
- Orbital many-body dynamics of bosons in the second Bloch band of an optical lattice
- Non-equilibrium quantum thermodynamics of a particle trapped in a controllable time-varying potential
- Longitudinal and transversal resonant tunneling of interacting bosons in a two-dimensional Josephson junction: Mean-field and many-body dynamics
- On a fragmented condensate in a uniform Bose system
- On the characterisation of fragmented Bose-Einstein condensation and its emergent effective evolution