Институт теоретической физики им. Л.Д. Ландау РАН
L.D. Landau Institute for Theoretical Physics RAS
International conference Research in superconductivity and beyond
Gerasim Eliashberg memorial conference
August, 23-26, 2021 Chernogolovka, Russia

Quantum electrodynamics of a Josephson junction coupled to a strongly dissipative environment
Date/Time: 14:00 25-Aug-2021
Josephson junction arrays constitute a promising platform to explore a large class of physical phenomena, from quantum phase transitions to non-linear quantum optics in the microwave domain. We will report on the measurement of a fully-tunable model system where a long chain of several thousands linear Josephson elements, acting as a strongly dissipative environment, is terminated by a small Josephson junction endowed with a strong non-linearity, acting as a single impurity. From microwave spectroscopic measurements, we extract the phase shift and the inelastic losses induced by the impurity onto the linear modes of the array. In agreement with a microscopic modeling of the circuit, we put into evidence a huge renormalization of the Josephson tunnel energy at the impurity site, and show that the associated enhancement of phase fluctuations provides the dominant dissipation mechanism in the array.


Roch Nicolas (Presenter)
(no additional information)

© 2012, Landau Institute for Theoretical Physics RAS www.itp.ac.ru
Contact webmaster