Axion-induced oscillations in Josephson qubits

TL;DR

This paper proposes a quantum model of axion interactions with Josephson qubits, predicting detectable oscillations that could enable axion detection in low-noise quantum systems.

Contribution

It introduces a two-level quantum model for axions coupled with Josephson qubits, highlighting a resonance effect for axion detection.

Findings

Resonance between axion and Josephson frequencies induces oscillations.

Oscillations cause periodic magnetization reversal in the junction.

Potential for axion detection in quantum low-noise regimes.

Abstract

An effective quantum description of the axion is proposed as a two-level dynamic system together with a spin-spin Hamiltonian for a coupled axion-Josephson qubit system. The interaction between axion and Josephson Junction can be responsible for a resonance effect, when the axion and the Josephson frequencies match. Thus, experimentally detectable oscillations induced in the Josephson qubit by its interaction with the axion are clearly highlighted. This phenomenon, causing a periodic magnetization reversal in the junction, can be exploited for the axion detection in the quantum limit of low noise.