Enhancing the Thermal Stability of Majorana Fermions with Redundancy Using Dipoles in Optical Lattices

TL;DR

This paper proposes using anisotropic dipolar interactions in optical lattices to significantly improve the thermal stability of Majorana fermions, enabling more reliable quantum information encoding.

Contribution

It introduces a model of oriented dipolar fermions in optical lattices that enhances non-local correlations of Majorana fermions at finite temperatures.

Findings

Domains with strong interactions show long-distance Majorana correlations at finite temperatures

Enhanced thermal stability suitable for quantum redundancy encoding

Model can be generalized to other configurations and systems

Abstract

Pairing between spinless fermions can generate Majorana fermion excitations that exhibit intriguing properties arising from non-local correlations. But simple models indicate that non-local correlation between Majorana fermions becomes unstable at non-zero temperatures. We address this issue by showing that anisotropic interactions between dipolar fermions in optical lattices can be used to significantly enhance thermal stability. We construct a model of oriented dipolar fermions in a square optical lattice. We find that domains established by strong interactions exhibit enhanced correlation between Majorana fermions over large distances and long times even at finite temperatures, suitable for stable redundancy encoding of quantum information. Our approach can be generalized to a variety of configurations and other systems, such as quantum wire arrays.