Novel two-qubit microwave photon detector for fundamental physics applications

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 1070; p. 170010
• Main Authors: Rettaroli, Alessio, Banchi, Leonardo, Corti, Hervè Atsè, D’Elia, Alessandro, Gatti, Claudio, Giachero, Andrea, Labranca, Danilo, Moretti, Roberto, Nucciotti, Angelo, Komnang, Alex Stephane Piedjou, Tocci, Simone
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-01-2025
• Subjects: Quantum sensing; Single photon detector; Single photon detector; Quantum sensing
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2024.170010

Quantum sensing is a rapidly expanding research field that finds one of its applications in fundamental physics, as the detection of light Dark Matter. Qubit-based superconducting devices have already been successfully applied in detecting few-GHz single photons via Quantum Non-Demolition measurements. The optimization and new design schemes of circuits embedding qubits will yield notable enhancements in sensitivity and suppression of dark count rates in experiments involving high-precision microwave photon detection, particularly in the search for Axions and Dark Photons. The Qub-It collaboration is developing a novel microwave photon detection scheme based on two qubits coupled to the same resonator, both in 2D and 3D formats.