The use of Josephson junctions as mixers and parametric amplifiers at microwaves

Johann Heyen Hinken

Johannes A. Russer, Michael Würth, Wolfgang Utschick +2 more

Joesphson parametric amplifiers (JPA), operating in the microwave regime, are a key component for quantum radar. A Josephson junction can combine the functions of local oscillator, mixer, amplifier and detector. For quantum radar based on two-mode squeezed vacuum states (TMSV), the Josephson devices perform squeezed state generation and mixing, for subsequent photon counting and hypothesis testing. In this contribution, we investigate quantum circuit for modeling of JPAs.

R. Y. Chiao

O. H. Soerensen, J. Mygind, N. F. Pedersen

Externally pumped parametric amplifiers are discussed. Theory and experiments on the singly degenerate parametric amplifier based on a Josephson junction are presented. Advantages and limitations of the singly degenerate and doubly degenerate parametric amplifiers are discussed. Some plans and proposals for future research are presented.

W. Jutzi

After a phenomenologic description of the Josephson effect, performance data of oscillators, detectors, mixers and parametric amplifiers as well as of integrated memory and logic circuits with Josephson junctions are presented.

Hans Zimmer