2004/03/09 by N. Gronbech-Jensen, Niels Grønbech‐Jensen, M. G. Castellano +7 · 6 citations
Computer Science · Physics and Astronomy · #Condensed matter physics #Crossover #Current (fluid) #Josephson effect #Materials science #Microwave #Nonlinear Dynamics and Pattern Formation #Physics #Pi Josephson junction #Plasma #Plasma oscillation #Quantum #Quantum Information and Cryptography #Quantum mechanics #Range (aeronautics) #Superconductivity #Thermal #Thermal fluctuations #cond-mat.stat-mech #cond-mat.supr-con #stochastic dynamics and bifurcation
paper · pdf · doi:10.1103/physrevlett.93.107002
published as Physical Review Letters Vol.93, 107002 (2004) · 10 pages and 4 figures
arxiv created 2004/03/09 · openalex publication_date 2004/08/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.