Abstract

We Explore The Interspecies Interaction Quench Dynamics Of Ultracold Spin-Polarized Few-Body Mass-Balanced Fermi-Fermi Mixtures Confined In A Double Well With An Emphasis On The Beyond Hartree-Fock Correlation Effects. It Is Shown That The Ground State Of Particle-Imbalanced Mixtures Exhibits A Symmetry Breaking Of The Single-Particle Density For Strong Interactions In The Hartree-Fock Limit, Which Is Altered Within The Many-Body Approach. Quenching The Interspecies Repulsion Towards The Strongly Interacting Regime, The Two Species Phase Separate Within The Hartree-Fock Approximation While Remaining Miscible In The Many-Body Treatment. Despite Their Miscible Character On The One-Body Level, The Two Species Are Found To Be Strongly Correlated And Exhibit A Phase Separation On The Two-Body Level That Suggests The Antiferromagneticlike Behavior Of The Few-Body Mixture. For Particle-Balanced Mixtures We Show That An Intrawell Fragmentation (Filamentation) Of The Density Occurs Both For The Ground State And Upon Quenching From Weak To Strong Interactions, A Result That Is Exclusively Caused By The Presence Of Strong Correlations. By Inspecting The Two-Body Correlations, A Phase Separation Of The Two Species Is Unveiled, Being A Precursor Towards An Antiferromagnetic State. Finally, We Simulate In Situ Single-Shot Measurements And Showcase How Our Findings Can Be Retrieved By Averaging Over A Sample Of Single-Shot Images.

Department(s)

Physics

Comments

Deutsche Forschungsgemeinschaft, Grant None

International Standard Serial Number (ISSN)

2469-9934; 2469-9926

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2024 American Physical Society, All rights reserved.

Publication Date

03 Jan 2019

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Physics Commons

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