We investigate, by experiments and numerical simulations, thermal activation processes of Josephson tunnel junctions in the presence of microwave radiation. When the applied signal resonates with the Josephson plasma frequency oscillations, the switching current may become multivalued in a temperature range far exceeding the classical to quantum crossover temperature. Plots of the switching currents traced as a function of the applied signal frequency show very good agreement with the functional forms expected from Josephson plasma frequency dependencies on the bias current. Throughout, numerical simulations of the corresponding thermally driven classical Josephson junction model show very good agreement with the experimental data.

Microwave-Induced Thermal Escape in Josephson Junctions / N., GRONBECH JENSEN; M. G., Castellano; F., Chiarello; M., Cirillo; Cosmelli, Carlo; L. V., Filippenko; R., Russo; G., Torrioli. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 93:(2004), pp. 107002-1-107002-4. [10.1103/PhysRevLett.93.107002]

Microwave-Induced Thermal Escape in Josephson Junctions

COSMELLI, Carlo;
2004

Abstract

We investigate, by experiments and numerical simulations, thermal activation processes of Josephson tunnel junctions in the presence of microwave radiation. When the applied signal resonates with the Josephson plasma frequency oscillations, the switching current may become multivalued in a temperature range far exceeding the classical to quantum crossover temperature. Plots of the switching currents traced as a function of the applied signal frequency show very good agreement with the functional forms expected from Josephson plasma frequency dependencies on the bias current. Throughout, numerical simulations of the corresponding thermally driven classical Josephson junction model show very good agreement with the experimental data.
2004
01 Pubblicazione su rivista::01a Articolo in rivista
Microwave-Induced Thermal Escape in Josephson Junctions / N., GRONBECH JENSEN; M. G., Castellano; F., Chiarello; M., Cirillo; Cosmelli, Carlo; L. V., Filippenko; R., Russo; G., Torrioli. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 93:(2004), pp. 107002-1-107002-4. [10.1103/PhysRevLett.93.107002]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/97930
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 50
  • ???jsp.display-item.citation.isi??? 47
social impact