Axion physics in a Josephson junction environment

TL;DR

This paper proposes using Josephson junction-based experiments to simulate and explore axionic dark matter physics, connecting condensed matter systems with cosmological phenomena.

Contribution

It introduces new experimental setups for simulating axion interactions in Josephson junctions, bridging cosmology and quantum condensed matter physics.

Findings

Accessible parameter regimes for axion cosmology in current nanotech

Proposed SQUID-like setups for axion interaction testing

Analogue simulation of early-universe axion physics

Abstract

We show that recent experiments based on Josephson junctions, SQUIDS, and coupled Josephson qubits have a cosmological interpretation in terms of axionic dark matter physics, in the sense that they allow for analogue simulation of early-universe axion physics. We propose new experimental setups in which SQUID-like axionic interactions in a resonant Josephson junction environment can be tested, similar in nature to recent experiments that test for quantum entanglement of two coupled Josephson qubits. We point out that the parameter values relevant for early-universe axion cosmology are accessible with present day's achievements in nanotechnology.