Dynamical Formation Of Two-Fold Fragmented Many-Body State Induced By An Impurity In A Double-Well

Author

Jie Chen
Simeon I. Mistakidis, Missouri University of Science and TechnologyFollow
Peter Schmelcher

Abstract

We Unravel The Correlated Quantum Quench Dynamics Of A Single Impurity Immersed In A Bosonic Environment Confined In An One-Dimensional Double-Well Potential. A Particular Emphasis Is Placed On The Structure Of The Time-Evolved Many-Body (MB) Wave Function By Relying On A Schmidt Decomposition Whose Coefficients Directly Quantify The Number Of Configurations That Are Macroscopically Populated. For A Non-Interacting Bosonic Bath And Weak Postquench Impurity-Bath Interactions, We Observe The Dynamical Formation Of A Two-Fold Fragmented MB State Which Is Related To Intra-Band Excitation Processes Of The Impurity And Manifests As A Two-Body Phase Separation (Clustering) Between The Two Species For Repulsive (Attractive) Interactions. Increasing The Postquench Impurity-Bath Coupling Strength Leads To The Destruction Of The Two-Fold Fragmentation Since The Impurity Undergoes Additional Inter-Band Excitation Dynamics. By Contrast, A Weakly Interacting Bath Suppresses Excitations Of The Bath Particles And Consequently The System Attains A Weakly Fragmented MB State. Our Results Explicate The Interplay Of Intra- And Inter-Band Impurity Excitations For The Dynamical Generation Of Fragmented MB States In Multi-Well Traps And For Designing Specific Entangled Impurity States.

Recommended Citation

J. Chen et al., "Dynamical Formation Of Two-Fold Fragmented Many-Body State Induced By An Impurity In A Double-Well," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 56, no. 7, article no. 075003, IOP Publishing, Apr 2023.

The definitive version is available at https://doi.org/10.1088/1361-6455/acbef3

Department(s)

Physics

Comments

National Science Foundation, Grant 170620586

Keywords and Phrases

one-dimensional physics; two-fold fragmented many-body state; ultracold atomic mixture

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

14 Apr 2023