A Single-Cooper-Pair Josephson Laser
Abstract
The advent of quantum optical techniques based on superconducting circuits has opened new regimes in the study of the non-linear interaction of light with matter. Of particular interest has been the creation of non-classical states of light, which are essential for continuous-variable quantum information processing, and could enable quantum-enhanced measurement sensitivity. Here we demonstrate a device consisting of a superconducting artificial atom, the Cooper pair transistor, embedded in a superconducting microwave cavity that may offer a path toward simple, continual production of non-classical photons. By applying a dc voltage to the atom, we use the ac Josephson effect to inject photons into the cavity. The backaction of the photons on single-Cooper-pair tunneling events results in a new regime of simultaneous quantum coherent transport of Cooper pairs and microwave photons. This single-pair Josephson laser offers great potential for the production of amplitude-squeezed photon states and a rich environment for the study of the quantum dynamics of nonlinear systems.
Cite
@article{arxiv.1311.2042,
title = {A Single-Cooper-Pair Josephson Laser},
author = {Fei Chen and Juliang Li and A. D. Armour and E. Brahimi and Joel Stettenheim and A. J. Sirois and R. W. Simmonds and M. P. Blencowe and A. J. Rimberg},
journal= {arXiv preprint arXiv:1311.2042},
year = {2015}
}
Comments
16 pages, 11 figures