8 papers
Nonlinear Feedback in Josephson Circuit Optimization: Application to a Kerr-Reversal JTWPA
Emanuele Palumbo, Alessandro Alocco, Andrea Celotto +4
Optimizing Josephson-based nonlinear microwave devices is computationally demanding because the straightforward approach requires exploring broad circuit parameter spaces through e…
Traceable In Situ Microwave Power Measurement at the Cryogenic Device Plane in a Dilution Refrigerator
Paolo Panetta, Andrea Celotto, Alessandro Alocco +7
Accurate knowledge of the microwave power delivered to a cryogenic device under test (DUT) is essential for the characterization and operation of superconducting quantum circuits.…
Device-Agnostic Microwave Noise Metrology for Nonlinear Cryogenic Quantum Devices
Andrea Celotto, Alessandro Alocco, Bernardo Galvano +6
Microwave devices capable of near-quantum-limited signal processing are essential components in the toolbox of solid-state quantum technologies. The manipulation and readout of sin…
JCO: Optimization Framework for Nonlinear Superconducting Circuits Using a Lumped-Element Approach and Harmonic Balance
Emanuele Palumbo, Alessandro Alocco, Andrea Celotto +4
In this contribution we present JosephsonCircuitsOptimizer.jl (JCO), a simulation and optimization framework based on the JosephsonCircuits.jl library for Julia. It models supercon…
Programmable Microwave Cluster States via Josephson Metamaterials
A. Alocco, A. Celotto, E. Palumbo +5
Cluster states are a fundamental resource for continuous-variable quantum computing, enabling measurement-based protocols that can scale beyond the limitations of qubit-based archi…
Full Two-Port S-Parameters at mK Temperatures: a Calibration Strategy and Uncertainty Budget
Luca Oberto, Ehsan Shokrolahzade, Emanuele Enrico +7
This paper describes the developed setup and characterization approach for full two-port calibrated S-parameter measurements at cryogenic temperatures, together with a complete unc…
Towards Quantifying Two-Mode Correlation Linewidths in Quantum Circuits
Alessandro Alocco, Andrea Celotto, Luca Fasolo +7
This paper aims to quantify the linewidth of two-mode correlations in Traveling Wave Parametric Amplifiers (TWPAs). Artifacts induced by data acquisition and processing, such as wi…
Broadband parametric amplification in DARTWARS
Marco Faverzani, Pietro Campana, Rodolfo Carobene +46
Superconducting parametric amplifiers offer the capability to amplify feeble signals with extremely low levels of added noise, potentially reaching quantum-limited amplification. T…