Quantum transport in coupled resonators enclosed synthetic magnetic flux

TL;DR

This paper investigates how synthetic magnetic flux affects light transport in a ring of coupled resonators, revealing conditions for resonant transmission and destructive interference, which are crucial for quantum information applications.

Contribution

It introduces a model of a ring of coupled resonators with synthetic magnetic flux acting as an Aharonov-Bohm interferometer for light transport.

Findings

Magnetic flux tuning enables resonant light transmission.

Half-integer flux quantum causes complete destructive interference.

The system functions as a controllable quantum interferometer.

Abstract

Quantum transport properties are instrumental to understanding quantum coherent transport processes. Potential applications of quantum transport are widespread, in areas ranging from quantum information science to quantum engineering, and not restricted to quantum state transfer, control and manipulation. Here, we study light transport in a ring array of coupled resonators enclosed synthetic magnetic flux. The ring configuration, with an arbitrary number of resonators embedded, forms an two-arm Aharonov-Bohm interferometer. The influence of magnetic flux on light transport is investigated. Tuning the magnetic flux can lead to resonant transmission, while half-integer magnetic flux quantum leads to completely destructive interference and transmission zeros in an interferometer with two equal arms.