0000000000707290

AUTHOR

L. Fasolo

showing 3 related works from this author

Noise Figures of Merit of rf-SQUID-based Josephson Travelling Wave Parametric Amplifiers

2021

The characterization of the rf-SQUID-based JTWPA in terms of its noise figure and gain for different input states (Fock states or Coherent states) has been carried out. The spectral distribution of the noise temperature Tn and gain G presents a region where the amplifier has a relatively high gain with a thermal noise that can go beyond the standard quantum limit =ℏ/2 (valid only for single mode input states [44]) as shown in Fig. 3. The TWJPA is here biased in its 3WM regime and pumped at p = 12 GHz.

Noise FigurePower GainJosephson Traveling Wave Parameter AmplifierSettore ING-INF/01 - Elettronica
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Bimodal Approach for Noise Figures of Merit Evaluation in Quantum-Limited Josephson Traveling Wave Parametric Amplifiers

2022

The advent of ultra-low noise microwave amplifiers revolutionized several research fields demanding quantum-limited technologies. Exploiting a theoretical bimodal description of a linear phase-preserving amplifier, in this contribution we analyze some of the intrinsic properties of a model architecture (i.e., an rf-SQUID based Josephson Traveling Wave Parametric Amplifier) in terms of amplification and noise generation for key case study input states (Fock and coherents). Furthermore, we present an analysis of the output signals generated by the parametric amplification mechanism when thermal noise fluctuations feed the device.

Superconducting microwave devicesMicrowave photonicMicrowave amplifiersCondensed Matter - SuperconductivityPhysicsFOS: Physical sciencesMicrowave photonics Noise figure Superconducting microwave devices.Condensed Matter PhysicsNoise figureSettore ING-INF/01 - ElettronicaSuperconducting microwave deviceElectronic Optical and Magnetic MaterialsSuperconductivity (cond-mat.supr-con)BandwidthMicrowave amplifierBandwidth; Gain; Microwave amplifiers; Microwave photonics; Noise figure; Physics; Superconducting microwave devicesMicrowave photonicsHardware_INTEGRATEDCIRCUITSPhysicGainElectrical and Electronic EngineeringPhysics Gain Microwave amplifiers Noise figure Superconducting microwave devices Microwave photonics Bandwidth Microwave photonics noise figure superconducting microwave devicesMicrowave photonics; Noise figure; Superconducting microwave devicesIEEE Transactions on Applied Superconductivity
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Microwave Quantum Radar using a Josephson Traveling Wave Parametric Amplifier

2021

Detection of low-reflectivity objects can be improved by the so-called Quantum Illumination (QI) procedure. However, quantum detection error probability exponentially decays with the source bandwidth. The Josephson Parametric Amplifiers (JPAs) technology utilized as a source, generating pairs of entangled signals called two-mode squeezed vacuum states, shows a very narrow bandwidth limiting the operation of the Microwave Quantum Illumination (MQI) systems. In this paper, for the first time, a microwave quantum radar setup based on quantum illumination protocol and using a Josephson Traveling Wave Parametric Amplifier (JTWPA) is proposed. We experimentally demonstrate the generation and cont…

Superconductivity (cond-mat.supr-con)Quantum PhysicsRadarCondensed Matter - SuperconductivityFOS: Physical sciencesQuantum Physics (quant-ph)2022 IEEE Radar Conference (RadarConf22)
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