Eur. Phys. J. B (2018) 91: 13
https://doi.org/10.1140/epjb/e2017-80421-0

Regular Article

Noise induced transition in Josephson junction with second harmonic

Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal 741246, India

^a e-mail: nb12rs061@iiserkol.ac.in

Received: 14 July 2017
Received in final form: 11 October 2017
Published online: 17 January 2018

Abstract

We show a noise induced transition in Josephson junction with fundamental as well as second harmonic. A periodically modulated multiplicative colored noise can stabilize an unstable configuration in such a system. The stabilization of the unstable configuration has been captured in the effective potential of the system obtained by integrating out the high frequency components of the noise. This is a classical approach to understand the stability of an unstable configuration due to the presence of such stochasticity in the system and our numerical analysis confirms the prediction from the analytical calculation.