Collective Excitations Of Dipolar Gases Based On Local Tunneling In Superlattices

Abstract

The Collective Dynamics Of A Dipolar Fermionic Quantum Gas Confined In A One-Dimensional Double-Well Superlattice Is Explored. The Fermionic Gas Resides In A Paramagnetic-Like Ground State In The Weak Interaction Regime, Upon Which A New Type Of Collective Dynamics Is Found When Applying A Local Perturbation. This Dynamics Is Composed Of The Local Tunneling Of Fermions In Separate Supercells, And Is A Pure Quantum Effect, With No Classical Counterpart. Due To The Presence Of The Dipolar Interactions The Local Tunneling Transports Through The Entire Superlattice, Giving Rise To A Collective Dynamics. A Well-Defined Momentum-Energy Dispersion Relation Is Identified In The Ab-Initio Simulations Demonstrating The Phonon-Like Behavior. The Phonon-Like Characteristic Is Also Confirmed By An Analytical Description Of The Dynamics Within A Semiclassical Picture.

Department(s)

Physics

Comments

Deutsche Forschungsgemeinschaft, Grant None

International Standard Serial Number (ISSN)

0301-0104

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Elsevier, All rights reserved.

Publication Date

12 Jan 2017

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