Abstract

We Investigate The Formation Of Magnetic Bose Polaron, An Impurity Atom Dressed By Spin-Wave Excitations, In A One-Dimensional Spinor Bose Gas. Within An Effective Potential Model, The Impurity Is Strongly Confined By The Host Excitations Which Can Even Overcome The Impurity-Medium Repulsion Leading To A Self-Localized Quasi-Particle State. The Phase Diagram Of The Attractive And Self-Bound Repulsive Magnetic Polaron, Repulsive Non-Magnetic (Fröhlich-Type) Polaron And Impurity-Medium Phase-Separation Regimes Is Explored With Respect To The Rabi-Coupling Between The Spin Components, Spin-Spin Interactions And Impurity-Medium Coupling. The Residue Of Such Magnetic Polarons Decreases Substantially In Both Strong Attractive And Repulsive Branches With Strong Impurity-Spin Interactions, Illustrating Significant Dressing Of The Impurity. The Impurity Can Be Used To Probe And Maneuver The Spin Polarization Of The Magnetic Medium While Suppressing Ferromagnetic Spin-Spin Correlations. It Is Shown That Mean-Field Theory Fails As The Spinor Gas Approaches Immiscibility Since The Generated Spin-Wave Excitations Are Prominent. Our Findings Illustrate That Impurities Can Be Utilized To Generate Controllable Spin-Spin Correlations And Magnetic Polaron States Which Can Be Realized With Current Cold Atom Setups.

Department(s)

Physics

Publication Status

Open Access

Comments

National Science Foundation, Grant 390715994

Keywords and Phrases

magnetic Bose gases; magnetic polaron; quasi-particle physics; spin-spin correlations; spin-waves

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

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Publication Date

01 Aug 2022

Download

Full Text Link

Included in

Physics Commons

Share

 
COinS