Quench-induced resonant tunneling mechanisms of bosons in an optical lattice with harmonic confinement

Abstract

The non-equilibrium dynamics of small boson ensembles in a one-dimensional optical lattice is explored upon a sudden quench of an additional harmonic trap from strong to weak confinement. We find that the competition between the initial localization and the repulsive interaction leads to a resonant response of the system for intermediate quench amplitudes, corresponding to avoided crossings in the many-body eigenspectrum with varying final trap frequency. In particular, we show that these avoided crossings can be utilized to prepare the system in a desired state. The dynamical response is shown to depend on both the interaction strength as well as the number of atoms manifesting the many-body nature of the tunneling dynamics.

14 pages, 6 figures

References in corpus (16)

• Many-Body Physics with Ultracold Gases
• Thermalization and its mechanism for generic isolated quantum systems
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• The multi-configurational time-dependent Hartree method for bosons: Many-body dynamics of bosonic systems
• Two Fermions in a double well: Exploring a fundamental building block of the Hubbard model
• Pinning quantum phase transition for a Luttinger liquid of strongly interacting bosons
• Quantum Monte Carlo simulations of confined bosonic atoms in optical lattices
• Spatial correlations of trapped 1d bosons in an optical lattice
• Site-resolved imaging of ytterbium atoms in a two-dimensional optical lattice
• Quantum gas microscopy with spin, atom-number and multi-layer readout
• Negative quench induced excitation dynamics for ultracold bosons in one-dimensional lattices
• Suppression of Quantum Scattering in Strongly Confined Systems
• Quenching small quantum gases: Genesis of the orthogonality catastrophe
• Real-time control of the periodicity of a standing wave: an optical accordion
• Many-body theory for systems with particle conversion: Extending the multiconfigurational time-dependent Hartree method
• Cold atoms in real-space optical lattices

Cited by in corpus (5)

• Spectral properties and breathing dynamics of a few-body Bose-Bose mixture in a 1D harmonic trap
• The multi-configurational time-dependent Hartree approach in optimized second quantization: imaginary time propagation and particle number conservation
• Dynamics of Ultracold Bosons in Artificial Gauge Fields: Angular Momentum, Fragmentation, and the Variance of Entropy
• Partial Fermionization---Spectral Universality in 1D Repulsive Bose Gases
• Many-body effects in the excitations and dynamics of trapped Bose-Einstein condensates