Phase- and frequency-controlled interference nonlinear optics in superconducting circuits

TL;DR

This paper introduces interference nonlinear optics in superconducting circuits, enabling phase- and frequency-controlled amplification and attenuation through nonlinear wave mixing and interference, with potential applications in quantum information science.

Contribution

It presents a novel physical mechanism combining nonlinear wave mixing and interference for phase- and frequency-sensitive control in superconducting circuits.

Findings

Demonstrates phase-controlled amplitude modulation with sudden gain-to-suppression transition.

Shows frequency-controlled transition from output enhancement to attenuation.

Introduces a new interference nonlinear optics mechanism in superconducting systems.

Abstract

We present a new type of phase- and frequency-sensitive amplification and attenuation in a cyclically driven three-level superconducting Josephson system. Different from the previous linear theory of pure phase-sensitive amplification, a new physical mechanism$-$combined action of nonlinear wave mixing and wave interference$-$is developed and leads to not only amplification but also attenuation. This is referred to as interference nonlinear optics. Our results show the sudden output signal transition from large gain to deep suppression by tuning the relative phase and in this case the system can act as a phase-controlled amplitude modulator. We also show the continuous change from output enhancement to attenuation by adjusting the driving-field frequency and in this situation the system behaves as a frequency-controlled amplitude modulator. Our study opens up a new perspective for its widespread applications in quantum information science.