# Holographic DC SQUID in the presence of dark matter

## TL;DR

This paper uses gauge-gravity duality to study how dark matter, modeled by an extra gauge field, influences the properties of a holographic SQUID, revealing a small but detectable impact on its maximal current.

## Contribution

It introduces a holographic model of a SQUID affected by dark matter, demonstrating how dark sector interactions can alter superconducting device behavior.

## Key findings

- Dark matter causes a measurable change in the SQUID's maximal current.
- The dark sector's influence is detectable via the current-phase relation.
- Kinetic mixing allows potential observation of dark matter effects in superconducting devices.

## Abstract

The gauge-gravity duality has been applied to examine the properties of holographic superconducting quantum device (SQUID), composed of two S-N-S Josephson junctions, influenced by dark sector modelled by the additional $U(1)$-gauge field coupled to the ordinary Maxwell one. The dark matter sector is known to affect the properties of superconductors and is expected to enter the current-phase relation. The kinetic mixing between two gauge fields provides a mechanism allowing for the conceivable observation of the effect. We find small but visible effect of the dark matter particle traversing the device, which shows up as a change of its maximal current.