Stroboscopic qubit measurement with squeezed illumination

Microwave squeezing represents the ultimate sensitivity frontier for superconducting qubit measurement. However, observation of enhancement has remained elusive, in part because integration with conventional dispersive readout pollutes the signal channel with antisqueezed vacuum. Here we induce a st...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Eddins, Andrew, Schreppler, Sydney, Toyli, David M, Martin, Leigh S, Hacohen-Gourgy, Shay, Govia, Luke C G, Ribeiro, Hugo, Clerk, Aashish A, Siddiqi, Irfan
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.08.2017
Subjects
Compressing
Light
Physics - Quantum Physics
Online AccessGet full text

Cover

More Information
Summary:Microwave squeezing represents the ultimate sensitivity frontier for superconducting qubit measurement. However, observation of enhancement has remained elusive, in part because integration with conventional dispersive readout pollutes the signal channel with antisqueezed vacuum. Here we induce a stroboscopic light-matter coupling with superior squeezing compatibility, and observe an increase in the room-temperature signal-to-noise ratio of 24%. Squeezing the orthogonal phase controls measurement backaction, slowing dephasing by a factor of 1.8. This protocol enables the practical use of microwave squeezing for qubit state measurement.
ISSN:2331-8422
DOI:10.48550/arxiv.1708.01674