Quantum estimation via parametric amplification in circuit QED arrays
Abstract
We propose a scheme for quantum estimation by means of parametric amplification in circuit Quantum Electrodynamics. The modulation of a SQUID interrupting a superconducting waveguide transforms an initial thermal two-mode squeezed state in such a way that the new state is sensitive to the features of the parametric amplifier. We find the optimal initial parameters which maximize the Quantum Fisher Information. In order to achieve a large number of independent measurements we propose to use an array of non-interacting resonators. We show that the combination of both large QFI and large number of measurements enables -in principle- the use of this setup for Quantum Metrology applications.
Cite
@article{arxiv.1509.04142,
title = {Quantum estimation via parametric amplification in circuit QED arrays},
author = {Ashley Wilkins and Carlos Sabín},
journal= {arXiv preprint arXiv:1509.04142},
year = {2015}
}
Comments
6 pages, 7 figures v2:cosmetic changes, published version