Dissipation-driven quantum state engineering uses the environment to steer the state of quantum systems and preserve quantum coherence in the steady state. We show that modulating the damping rate of a microwave resonator generates a vacuum squeezed state of arbitrary squeezing strength, thereby constituting a mechanism allowing perfect squeezing. Given the recent experimental realizations in circuit QED of a microwave resonator with a tunable damping rate [Yin et al., Phys. Rev. Lett. 110, 107001 (2013)], superconducting circuits are an ideal playground to implement this technique. By dispersively coupling a qubit to the microwave resonator, it is possible to obtain qubit-state dependent squeezing.
@article{arxiv.1307.5311,
title = {Perfect squeezing by damping modulation in circuit quantum electrodynamics},
author = {Nicolas Didier and Farzad Qassemi and Alexandre Blais},
journal= {arXiv preprint arXiv:1307.5311},
year = {2015}
}