Topological Superfluid Transition Induced by Periodically Driven Optical Lattice

TL;DR

This paper proposes a method to induce a topological superfluid phase in a 2D optical lattice by periodic driving, enabling the realization of Floquet topological superfluids hosting Majorana fermions.

Contribution

It introduces a novel approach to create Floquet topological superfluids in optical lattices through periodic potential modulation, expanding the possibilities for topological quantum states.

Findings

Phase transition from trivial to topological superfluid identified.

Periodic driving induces Floquet topological superfluid phase.

Potential hosting of Majorana fermions demonstrated.

Abstract

We propose a scenario to create topological superfluid in a periodically driven two-dimensional square optical lattice. We study the phase diagram of a spin-orbit coupled s-wave pairing superfluid in a periodically driven two-dimensional square optical lattice. We find that a phase transition from a trivial superfluid to a topological superfluid occurs when the potentials of the optical lattices are periodically changed. The topological phase is called Floquet topological superfluid and can host Majorana fermions.