Speaker
Description
Quantum Parity Detectors (QPDs) are charge qubit-based phonon-mediated particle detectors with the prospect of detecting meV energy depositions in the target. The detection principle is as follows: phonons generated from an interaction within the crystalline substrate break Cooper-pairs in a superconducting phonon absorber, increasing the quasiparticle density near the qubit junction, hence increasing the measured tunneling rate across the junction. These devices benefit from inherent multiplexability, non-dissipative operation, and exponential suppression of thermal noise with temperature. In this talk, we will discuss the progress of Cooper-pair box (CPB) QPDs, including demonstration of their operation, measurement of limiting backgrounds, and calibration results from phonons generated via 1.32 eV and 5.79 meV photons.