Abstract
We Investigate The Ground State Properties And The Nonequilibrium Dynamics Of A Lattice Trapped Bosonic Mixture Consisting Of An Impurity Species And A Finite-Sized Medium. For The Case Of One As Well As Two Impurities We Observe That, Depending On The Lattice Depth And The Interspecies Interaction Strength, A Transition From A Strongly Delocalized To A Localized Impurity Distribution Occurs. In The Latter Regime The Two Species Phase Separate, Thereby Forming A Particle-Hole Pair. For Two Impurities We Find That Below A Critical Lattice Depth They Are Delocalized Among Two Neighboring Outer Lattice Wells And Are Two-Body Correlated. This Transition Is Characterized By A Crossover From Strong To A Suppressed Interspecies Entanglement For Increasing Impurity-Medium Repulsion. Turning To The Dynamical Response Of The Mixture, Upon Quenching The Interspecies Repulsion To Smaller Values, We Reveal That The Predominant Tunneling Process For A Single Impurity Corresponds To That Of A Particle-Hole Pair, Whose Dynamical Stability Depends Strongly On The Quench Amplitude. During The Time-Evolution A Significant Increase Of The Interspecies Entanglement Is Observed, Caused By The Build-Up Of A Superposition Of States And Thus Possesses A Many-Body Nature. In The Case Of Two Bosonic Impurities The Particle-Hole Pair Process Becomes Unstable In The Course Of The Dynamics With The Impurities Aggregating In Adjacent Lattice Sites While Being Strongly Correlated.
Recommended Citation
K. Keiler et al., "Doping A Lattice-Trapped Bosonic Species With Impurities: From Ground State Properties To Correlated Tunneling Dynamics," New Journal of Physics, vol. 22, no. 8, article no. 083003, IOP Publishing, Aug 2020.
The definitive version is available at https://doi.org/10.1088/1367-2630/ab9e34
Department(s)
Physics
Publication Status
Open Access
Keywords and Phrases
correlations; impurities; optical lattice
International Standard Serial Number (ISSN)
1367-2630
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Aug 2020
