Abstract
We Explore The Stability Of The Phase Separation Phenomenon In Few-Fermion Spin-1/2 Systems Confined In A Double-Well Potential. It Is Shown That Within The SU(2) Symmetric Case, Where The Total Spin Is Conserved, The Phase Separation Cannot Be Fully Stabilized. An Interaction Regime Characterized By Metastable Phase Separation Emerges For Intermediate Interactions Which Is Inherently Related With Ferromagnetic Spin-Spin Correlations Emerging Within Each Of The Wells. The Breaking Of The SU(2) Symmetry Crucially Affects The Stability Properties Of The System As The Phase Separated State Can Be Stabilized Even For Weak Magnetic Potential Gradients. Our Results Imply An Intricate Relation Between The Phenomena Of Phase Separation And Ferromagnetism That Lies Beyond The View Of The Stoner Instability.
Recommended Citation
G. M. Koutentakis et al., "Interplay Of Phase Separation And Itinerant Magnetism For Correlated Few Fermions In A Double-Well," New Journal of Physics, vol. 22, no. 6, article no. 063058, IOP Publishing, Jun 2020.
The definitive version is available at https://doi.org/10.1088/1367-2630/ab90d6
Department(s)
Physics
Publication Status
Open Access
Keywords and Phrases
ferromagnetism; few-body systems; out-of-equilibrium dynamics; phase separation; quantum gases; quantum magnetism; ultracold fermions
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 Jun 2020
