We consider a superconducting quantum point contact in a circuit quantum electrodynamics setup. We study three different configurations, attainable with current technology, where a quantum point contact is coupled galvanically to a coplanar waveguide resonator. Furthermore, we demonstrate that the strong and ultrastrong coupling regimes can be achieved with realistic parameters, allowing the coherent exchange between a superconducting quantum point contact and a quantized intracavity field.
@article{arxiv.1202.5507,
title = {Circuit Quantum Electrodynamics with a Superconducting Quantum Point Contact},
author = {G. Romero and I. Lizuain and V. S. Shumeiko and E. Solano and F. S. Bergeret},
journal= {arXiv preprint arXiv:1202.5507},
year = {2012}
}
Comments
5 pages, 4 figures. Updated version, accepted for publication as a Rapid Communication in Physical Review B