Parametric conversion and amplification based on three-wave mixing are powerful primitives for efficient quantum operations. For superconducting qubits, such operations can be realized with a quadrupole Josephson junction element, the Josephson Ring Modulator (JRM), which behaves as a loss-less three-wave mixer. However, combining multiple quadrupole elements is a difficult task so it would be advantageous to have a pure three-wave dipole element that could be tessellated for increased power handling and/or information throughput. Here, we present a dipole circuit element with third-order nonlinearity, which implements three-wave mixing. Experimental results for a non-degenerate amplifier based on the proposed pure third-order nonlinearity are reported.
@article{arxiv.1702.00869,
title = {3-Wave Mixing Josephson Dipole Element},
author = {N. E. Frattini and U. Vool and S. Shankar and A. Narla and K. M. Sliwa and M. H. Devoret},
journal= {arXiv preprint arXiv:1702.00869},
year = {2017}
}