US 12,437,223 B2
Phase-accurate generation of quantum-computing control signals
Michele Collodo, Zürich (CH); and Flavio Heer, Lufingen (CH)
Assigned to ZURICH INSTRUMENTS AG, Zurich (CH)
Appl. No. 18/707,715
Filed by ZURICH INSTRUMENTS AG, Zürich (CH)
PCT Filed Dec. 15, 2021, PCT No. PCT/EP2021/085865
§ 371(c)(1), (2) Date May 6, 2024,
PCT Pub. No. WO2023/110072, PCT Pub. Date Jun. 22, 2023.
Prior Publication US 2025/0094852 A1, Mar. 20, 2025
Int. Cl. G06N 10/40 (2022.01); H03K 3/01 (2006.01); H03M 1/12 (2006.01)
CPC G06N 10/40 (2022.01) [H03K 3/01 (2013.01); H03M 1/12 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for generating at least two signals Sk with k=1 . . . K by a signal generator, wherein the signal generator comprises at least a first channel k′ and a second channel k″, with each channel k having
a digital section adapted to generate a digital signal set comprising at least one digital signal having a frequency ωNCOk, wherein the digital signal set encodes digital phase information indicative of a phase shift φk,
at least one digital-analog converter adapted to convert the digital signal set into an analog signal set comprising at least one analog signal having a frequency ωNCOk, wherein the analog signal set encodes the information indicative of the phase shift φk,
an up-converter comprising a local oscillator adapted to generate an analog oscillator signal at a frequency ωLOk and a mixer adapted to generate an up-converted signal from the analog oscillator signal and the analog signal set, wherein the up-converted signal has a frequency of ωLOk+ωNCOk with the phase shift φk,
said method comprising:
generating, at a time t0, a first pulse with the first channel k′ and a first pulse with the second channel k″,
generating, at a time t0, a second pulse with the first channel k′ and a second pulse with the second channel k″,
operating, during both times t0 and t1,
the local oscillator of the first channel k′ at a frequency ωLOk′,
the local oscillator of the second channel k″ at a frequency ωLOk″,
the numerically controlled oscillator of the first channel at a frequency ωNCOk,
the numerically controlled oscillator of the second channel at a frequency ωNCOk″,
operating the digital sections of both channels at the times t0 and t1 to generate pulse envelopes for the pulses,
changing, between the times t0 and t1, at least one of
the phase shift φk′ of the first channel and
the phase shift φk″ of the second channel, while maintaining

OG Complex Work Unit Math
with φk′0 and φk′1 being the phase shifts of the first channel at the times t0 and t1, respectively and φk″0 and or φk″1 being the phase shifts of the second channel at the times t0 and t1, respectively.