Simulation of Collective Excitations in Long Josephson Junction Stacks
1 BLTP, Joint Institute for Nuclear Research, Dubna 141980, Russia
2 Umarov Physical Technical Institute, Tajik Academy of Science, Dushanbe 734063, Tajikistan
3 Dubna State University, Dubna 141980, Russia
4 University of Plovdiv Paisii Hilendarski, Plovdiv 4000, Bulgaria
5 LIT, Joint Institute for Nuclear Research, Dubna 141980, Russia
6 Peoples’ Friendship University of Russia (RUDN University), Moscow, Russia
7 Department of Experimental Physics, Comenius University, Bratislava, Slovakia
8 Utsunomiya University, Utsunomiya 321-8585, Japan
Published online: 14 February 2018
The phase dynamics of a stack of long Josephson junctions has been studied. Both inductive and capacitive couplings between Josephson junctions have been taken into account in the calculations. The IV-curve, the dependence on the bias current of the radiation power and dynamics of each JJs of the stack have been investigated. The coexistence of the charge traveling wave and fluxon states has been observed. This state can be considered as a new collective excitation in the system of coupled Josephson junctions. We demonstrate that the observed collective excitation leads to the decrease of radiation power from the system.
© The Authors, published by EDP Sciences, 2018
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