US 12,333,383 B2
Additive control of qubits for enabling time-domain and frequency-domain mutiplexing
Johannes Heinsoo, Espoo (FI)
Assigned to IQM Finland Oy, Espoo (FI)
Filed by IQM Finland Oy, Espoo (FI)
Filed on Jun. 26, 2020, as Appl. No. 16/913,544.
Claims priority of application No. 20155370 (EP), filed on Feb. 4, 2020.
Prior Publication US 2021/0241159 A1, Aug. 5, 2021
Int. Cl. G06N 10/40 (2022.01); G06F 1/20 (2006.01); G06N 10/20 (2022.01); G11C 11/44 (2006.01)
CPC G06N 10/40 (2022.01) [G06F 1/20 (2013.01); G06N 10/20 (2022.01); G11C 11/44 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A quantum electronics circuit comprising:
a plurality of quantum circuit elements;
a plurality of control signal lines; and
signal couplings between said control signal lines and said quantum circuit elements, for coupling at least some of said control signal lines with at least some of said quantum circuit elements,
wherein said plurality of control signal lines comprises at least a first subset of control signal lines and a second subset of control signal lines, and
wherein said signal couplings are arranged to couple each of at least a subgroup of said quantum circuit elements with a respective control signal line of said first subset and a respective control signal line of said second subset, for enabling additively controlling quantum mechanical states of individual quantum circuit elements of said subgroup with a plurality of mutually additive control signals transmitted through the respective control signal line of said first subset and the respective control signal line of said second subset, wherein the plurality of mutually additive control signals are, in combination, configured to affect the quantum mechanical states of individual quantum circuit elements of said subgroup, and wherein the plurality of mutually additive control signals are all of a same type and comprise either: (i) direct current (DC) pulses for creating a magnetic flux, the DC pulses resulting in a combined flux quanta that is greater than or equal to a predetermined on-signal threshold of the individual quantum circuit elements of said subgroup, or (ii) radiofrequency (RF) waveforms having a combined frequency that is within a predetermined frequency range of a resonant frequency of the individual quantum circuit elements of said subgroup.