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Unconventional Phases of Attractive Fermi Gases in Synthetic Hall Ribbons

Ghosh, Sudeep Kumar, Greschner, Sebastian, Yadav, Umesh K., Mishra, Tapan, Rizzi, Matteo, Shenoy, Vijay B. (2017) Unconventional Phases of Attractive Fermi Gases in Synthetic Hall Ribbons. Physical Review A, 95 (6). Article Number 63612. ISSN 2469-9926. (doi:10.1103/PhysRevA.95.063612) (KAR id:75716)

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https://doi.org/10.1103/PhysRevA.95.063612

Abstract

An innovative way to produce quantum Hall ribbons in a cold atomic system is to use M hyperfine states of atoms in a one-dimensional optical lattice to mimic an additional “synthetic dimension.” A notable aspect here is that the SU(M) symmetric interaction between atoms manifests as “infinite ranged” along the synthetic dimension. We study the many-body physics of fermions with SU(M) symmetric attractive interactions in this system using a combination of analytical field-theoretic and numerical density-matrix renormalization-group methods. We uncover the rich ground-state phase diagram of the system, including unconventional phases such as squished baryon fluids, shedding light on many-body physics in low dimensions. Remarkably, changing the parameters entails interesting crossovers and transition; e.g., we show that increasing the magnetic field (that produces the Hall effect) converts a “ferrometallic” state at low fields to a “squished baryon superfluid” (with algebraic pairing correlations) at high fields. We also show that this system provides a unique opportunity to study quantum phase separation in a multi flavor ultracold fermionic system.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevA.95.063612
Uncontrolled keywords: Physics of Quantum Materials
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Sudeep Kumar Ghosh
Date Deposited: 08 Aug 2019 08:49 UTC
Last Modified: 20 Sep 2020 03:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/75716 (The current URI for this page, for reference purposes)
Ghosh, Sudeep Kumar: https://orcid.org/0000-0002-3646-0629
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