Noise Figures of Merit of rf-SQUID-based Josephson Travelling Wave Parametric Amplifiers
- Autori: Fasolo, L.; Barone, C.; Borghesi, M.; Carapella, G.; Caricato, A. P.; Carusotto, I.; Cian, A.; Di Gioacchino, D.; Enrico, E.; Falferi, P.; Faverzani, M.; Ferri, E.; Filatrella, G.; Gatti, C.; Giachero, A.; Giubertoni, D.; Greco, A.; Leo, A.; Ligi, C.; Livreri, P.; Maccarrone, G.; Margesin, B.; Maruccio, G.; Mezzena, R.; Monteduro, A. G.; Nucciotti, A.; Oberto, L.; Pagano, S.; Pierro, V.; Piersanti, L.; Rajteri, M.; Rizzato, S.; Vinante, A.
- Anno di pubblicazione: 2021
- Tipologia: Abstract in atti di convegno pubblicato in volume
- OA Link: http://hdl.handle.net/10447/520963
Abstract
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.