TY - JOUR
T1 - Stroboscopic Qubit Measurement with Squeezed Illumination
AU - Eddins, A.
AU - Schreppler, S.
AU - Toyli, D. M.
AU - Martin, L. S.
AU - Hacohen-Gourgy, S.
AU - Govia, L. C.G.
AU - Ribeiro, H.
AU - Clerk, A. A.
AU - Siddiqi, I.
N1 - Funding Information: The authors thank E. Flurin for useful discussions, V. V. Ramasesh for technical assistance, and MIT Lincoln Labs for fabrication of the JTWPA with support from the LPS and IARPA. This work was supported by the ARO (No. W911NF-14-1-0078). A. E. acknowledges support from the Department of Defense through the NDSEG fellowship program. L. M. acknowledges support from the Berkeley Fellowship and the National Science Foundation Graduate Research Fellowship. Publisher Copyright: © 2018 American Physical Society.
PY - 2018/1/26
Y1 - 2018/1/26
N2 - Microwave squeezing represents the ultimate sensitivity frontier for superconducting qubit measurement. However, measurement enhancement has remained elusive, in part because integration with standard dispersive readout pollutes the signal channel with antisqueezed noise. Here we induce a stroboscopic light-matter coupling with superior squeezing compatibility, and observe an increase in the final signal-to-noise ratio of 24%. Squeezing the orthogonal phase slows measurement-induced dephasing by a factor of 1.8. This scheme provides a means to the practical application of squeezing for qubit measurement.
AB - Microwave squeezing represents the ultimate sensitivity frontier for superconducting qubit measurement. However, measurement enhancement has remained elusive, in part because integration with standard dispersive readout pollutes the signal channel with antisqueezed noise. Here we induce a stroboscopic light-matter coupling with superior squeezing compatibility, and observe an increase in the final signal-to-noise ratio of 24%. Squeezing the orthogonal phase slows measurement-induced dephasing by a factor of 1.8. This scheme provides a means to the practical application of squeezing for qubit measurement.
UR - https://www.scopus.com/pages/publications/85041074568
U2 - 10.1103/PhysRevLett.120.040505
DO - 10.1103/PhysRevLett.120.040505
M3 - Article
SN - 0031-9007
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 040505
ER -