Adiabatic topological passage based on coupling of giant atom with two Su-Schrieffer-Heeger chains

TL;DR

This paper proposes a method for adiabatic transfer of excitations between a giant atom and topological SSH chains, demonstrating robustness and potential applications in quantum information processing.

Contribution

It introduces a novel adiabatic topological passage technique using a giant atom coupled to SSH chains, enabling controlled excitation transfer.

Findings

Successful adiabatic transfer of excitations to chain ends

Robustness against frequency mismatch and disorder

Potential for quantum information applications

Abstract

We study an adiabatic topological passage of two Su-Schrieffer-Heeger (SSH) chains mediated by a giant atom. When two finite SSH chains are in the topological phase and the frequency of the giant atom is equal to the center frequency of the SSH chains, the system is reduced to a subsystem that describes the coupling of a giant atom to the edge states of two SSH chains. In this case, we can find dark states that act as adiabatic topological passages. This allows us to adiabatically transfer excitations of the giant atom to either one end of two SSH chains in a fully controllable way. In addition, we show good robustness of the adiabatic topological passages to both giant atom frequency mismatch and the coupling disorders in two SSH chains. Our study provides a method to realize quantum information processing and fabricate quantum optical devices based on the coupling of the giant atom to topological matter.