Simulation of collective excitations in the stack of long Josephson junctions

Speaker

Dr Ilhom Rahmonov (BLTP, Joint Institute for Nuclear Research)

Description

We consider the generalized model of the system of coupled long JJs[1] which takes into account the inductive and capacitive coupling and the diffusion current[2,3]. Numerical investigation of phase dynamics of long JJs stack is based on the parallel simulation algorithm which provides an essential acceleration of simulation procedure[4]. Using the developed numerical approach, we demonstrate a creation of charge travelling wave in the system of coupled LJJs. Another important result is related to the demonstration of the coexistence of the charge travelling wave with the standard fluxon mode. This fact indicates an appearance of a new unique collective excitation in the system of coupled Josephson junctions, namely, a composite state of the Josephson current, electric field, and vortex magnetic field. We have demonstrated the effect of this collective excitation on the power of the electromagnetic radiation from the stack of long JJs. This work was funded by RFBR according to the research project 15–29–01217 [1] R. Kleiner, F. Steinmeyer, G. KunkelandP. Muller. // Phys. Rev. Lett. , V. 68, 2394 (1992). [2] I. R. Rahmonov, Yu. M. Shukrinov, A. Irie // JETP Letters V. 99, 632 (2014). [3] I. R. Rahmonov, Yu. M. Shukrinov, P. Kh. Atanasova, E. V. Zemlyanaya, M. V. Bashashin, JETP V124, 131 (2017). [4] I. R. Rahmonov, Yu. M. Shukrinov, A. Plecenik, E. V. Zemlyanaya and M. V. Bashashin, EPJ Web of Conferences V108, 02038 (2016).

Primary author

Dr Ilhom Rahmonov (BLTP, Joint Institute for Nuclear Research)

Co-authors

Dr Elena Zemlyanaya (leading researcher) Mr Maksim Bashashin (Laboratory of Information Technologies, JINR) Mr Maxim Zuev (JINR) Dr Oksana Streltsova (JINR) Dr Pavlina Atanasova (Plovdiv University, Bulgaria) Prof. Yury Shukrinov (BLTP, Joint Institute for Nuclear Research)

Presentation Materials