The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2020
Filed:
Mar. 09, 2017
Socpra Sciences ET Génie S.e.c., Sherbrooke, QC, CA;
Alexandre Blais, Sherbrooke, CA;
Baptiste Royer, Sherbrooke, CA;
Arne Loehre Grimsmo, Sherbrooke, CA;
SOCPRA Sciences et Génie s.e.c., Sherbrooke, QC, CA;
Abstract
A method and circuit QED implementation of a control-phase quantum logic gate U(θ)=diag[1,1,1, e]. Two qubits Q, two resonators R, Rand a modulator. Qand Q, each has a frequency ωand characterized by {circumflex over (σ)}. Ris associated with Qand defined by a quantum non-demolition (QND) longitudinal coupling g{circumflex over (σ)}(â†+â). Ris integrated into R, the QND second longitudinal coupling is defined by Ras g{circumflex over (σ)}({circumflex over (b)}†+{circumflex over (b)}) or, when Ris integrated into R, the QND second longitudinal coupling is defined by Ras g{circumflex over (σ)}(â†+â) The modulator periodically modulates, at a frequency ωduring a time t, the longitudinal coupling strengths gand gwith respective signals of respective amplitudes {tilde over (g)}and {tilde over (g)}. Selecting a defined value for each of t, gand gdetermines θ to specify a quantum logical operation performed by the gate. Qand Qare decoupled when either one of gand gis to set to 0.