Novel Light Dark Matter Detection with Quantum Parity Detector Using Qubit Arrays

TL;DR

This paper proposes a quantum parity detector using qubit arrays for light dark matter detection, achieving high sensitivity and resolution, and demonstrating significant improvements over existing methods.

Contribution

It introduces a novel two-chip quantum detector design with parity measurement for enhanced dark matter detection sensitivity.

Findings

Detects energy depositions of ≥30 meV with near 100% efficiency

Significantly improves sensitivity to dark matter scattering cross sections

Enhances detection capabilities for axions and dark photons in specific mass ranges

Abstract

We present the design and the sensitivity reach of the Qubit-based Light Dark Matter detection experiment. We propose the novel two-chip design to reduce signal dissipation, with quantum parity measurement to enhance single-phonon detection sensitivity. We demonstrate the performance of the detector with full phonon and quasiparticle simulations. The experiment is projected to detect $\gtrsim 30$ meV energy deposition with nearly $100\%$ efficiency and high energy resolution. The sensitivity to $m_\chi\gtrsim 0.01$ MeV dark matter scattering cross section is expected to be advanced by orders of magnitude for both light and heavy mediators, and similar improvements will be achieved for axion and dark photon absorption in the $0.04$-$0.2$ eV mass range.