Unconventional phases of attractive Fermi gases in synthetic Hall ribbons

Ghosh, Sudeep Kumar and Greschner, Sebastian and Yadav, Umesh K and Mishra, Tapan and Rizzi, Matteo and Shenoy, Vijay B (2017) Unconventional phases of attractive Fermi gases in synthetic Hall ribbons. In: PHYSICAL REVIEW A, 95 (6).

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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 multiflavor ultracold fermionic system.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW A
Additional Information:	Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Jul 2017 10:13
Last Modified:	21 Jul 2017 10:13
URI:	http://eprints.iisc.ac.in/id/eprint/57460

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