Noise at the quantum limit over a large bandwidth is a fundamental requirement for future applications operating at millikelvin temperatures, such as the neutrino mass measurement, the next-generation x-ray observatory, the CMB measurement, the dark matter and axion detection, and the rapid high-fidelity readout of superconducting qubits. The read out sensitivity of arrays of microcalorimeter detectors, resonant axion-detectors, and qubits, is currently limited by the noise temperature and bandwidth of the cryogenic amplifiers. The DARTWARS (Detector Array Readout with Traveling Wave AmplifieRS) project has the goal of developing high-performing innovative traveling wave parametric amplifiers (TWPAs) with a high gain, a high saturation power, and a quantum-limited or nearly quantum-limited noise. The practical development follows two different promising approaches, one based on the Josephson junctions and the other one based on the kinetic inductance of a high-resistivity superconductor. In this contribution we present the aims of the project, the adopted design solutions and preliminary results from simulations and measurements.
@article{arxiv.2111.01512,
title = {Detector Array Readout with Traveling Wave Amplifiers},
author = {A. Giachero and C. Barone and M. Borghesi and G. Carapella and A. P. Caricato and I. Carusotto and W. Chang and A. Cian and D. Di Gioacchino and E. Enrico and P. Falferi and L. Fasolo and M. Faverzani and E. Ferri and G. Filatrella and C. Gatti and D. Giubertoni and A. Greco and C. Kutlu and A. Leo and C. Ligi and G. Maccarrone and B. Margesin and G. Maruccio and A. Matlashov and C. Mauro and R. Mezzena and A. G. Monteduro and A. Nucciotti and L. Oberto and S. Pagano and V. Pierro and L. Piersanti and M. Rajteri and S. Rizzato and Y. K. Semertzidis and S. Uchaikin and A. Vinante},
journal= {arXiv preprint arXiv:2111.01512},
year = {2022}
}