Hidden Magnetism in Periodically Modulated One Dimensional Dipolar Fermions

TL;DR

This paper predicts the emergence of hidden magnetic phases in a one-dimensional dipolar Fermi gas under periodic modulation, characterized by nonlocal string order parameters, with potential for experimental realization.

Contribution

It introduces a new mechanism for hidden magnetism in dipolar fermions driven by long-range interactions and periodic modulation, combining theoretical and numerical analysis.

Findings

Hidden magnetic phases characterized by string order parameters.

Existence of these phases within experimentally accessible parameters.

Both charge and spin degrees of freedom exhibit hidden magnetic order.

Abstract

The experimental realization of time dependent ultracold lattice systems has paved the way towards the implementation of new Hubbard-like Hamiltonians. We show that in a one dimensional two components lattice dipolar Fermi gas the competition between long range repulsion and correlated hopping induced by periodically modulated on-site interaction allows for the formation of exotic hidden magnetic phases. The magnetism, characterized solely by string-like nonlocal order parameters, manifests itself both in the charge and, noticeably, in the spin degrees of freedom. Such behavior is enlighten by employing both Luttinger theory and numerical methods. Crucially the range of parameters for which hidden magnetism is present can be reached by means of the currently available experimental setups and probes.