Chaos in Josephson nanostructures
Seminars
Seminar “Physics of nanostructures”
Date and Time: Wednesday, 20 September 2017, at 11:00 AM
Venue: Lecture Hall (2nd floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: «Chaos in Josephson nanostructures»
Speakers: Svetlana Medvedeva, Yuri Shukrinov (Department of General and Applied Physics, Moscow Institute of Physics and Technology – MIPT)
Abstract:
Investigation of chaotic states in Josephson junctions has great role for its practical application. Due to this we consider chaos in single Josephson junction and also in the system of coupled Josephson junctions. We have used capacitively coupled Josephson junctions (CCJJ+DC) with diffusion current model to calculate voltage-current characteristics, Lyapunov exponents and bifurcation diagrams. Results on the study of the devil’s staircase as in single Josephson junction and in the stack of coupled junctions are presented. The influence of coupling parameter, dissipation parameter, frequency and amplitude of external electromagnetic radiation on chaotic regions and subharmonic structure in IV-characteristics will be discussed.