Abstract

The Nonequilibrium Quantum Dynamics Of Few Boson Ensembles Which Experience A Spatially Modulated Interaction Strength And Are Confined In Finite Optical Lattices Is Investigated. We Utilize A Cosinusoidal Spatially Modulated Effective Interaction Strength Which Is Characterized By Its Wavevector, Inhomogeneity Amplitude, Interaction Offset And A Phase. Performing Quenches Either On The Wavevector Or The Phase Of The Interaction Profile An Enhanced Imbalance Of The Interatomic Repulsion Between Distinct Spatial Regions Of The Lattice Is Induced. Following Both Quench Protocols Triggers Various Tunneling Channels And A Rich Excitation Dynamics Consisting Of A Breathing And A Cradle Mode. All Modes Are Shown To Be Amplified For Increasing Inhomogeneity Amplitude Of The Interaction Strength. Especially The Phase Quench Induces A Directional Transport Enabling Us To Discern Energetically, Otherwise, Degenerate Tunneling Pathways. Moreover, A Periodic Population Transfer Between Distinct Momenta For Quenches Of Increasing Wavevector Is Observed, While A Directed Occupation Of Higher Momenta Can Be Achieved Following A Phase Quench. Finally, During The Evolution Regions Of Partial Coherence Are Revealed Between The Predominantly Occupied Wells.

Department(s)

Physics

Comments

Deutsche Forschungsgemeinschaft, Grant None

Keywords and Phrases

excited states; few-body systems; nonequilibrium dynamics; optical lattices; quench dynamics; spatially dependent interactions

International Standard Serial Number (ISSN)

1361-6455; 0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 IOP Publishing, All rights reserved.

Publication Date

24 Oct 2018

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Physics Commons

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