US 11,782,779 B2
Techniques for error correction of a logical qubit and related systems and methods
Victor V. Albert, New Haven, CT (US); Shantanu Mundhada, New Haven, CT (US); Alexander Grimm, New Haven, CT (US); Steven Touzard, New Haven, CT (US); Michel Devoret, New Haven, CT (US); and Liang Jiang, Guilford, CT (US)
Assigned to Yale University, New Haven, CT (US)
Appl. No. 16/959,209
Filed by Yale University, New Haven, CT (US)
PCT Filed Jan. 5, 2019, PCT No. PCT/US2019/012438
§ 371(c)(1), (2) Date Jun. 30, 2020,
PCT Pub. No. WO2019/164591, PCT Pub. Date Aug. 29, 2019.
Claims priority of provisional application 62/613,956, filed on Jan. 5, 2018.
Prior Publication US 2020/0334101 A1, Oct. 22, 2020
Int. Cl. G06F 11/07 (2006.01); G06N 10/00 (2022.01); G06N 10/70 (2022.01)
CPC G06F 11/0751 (2013.01) [G06F 11/0736 (2013.01); G06N 10/00 (2019.01); G06N 10/70 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a circuit quantum electrodynamics system that includes:
a logical qubit comprising first and second quantum mechanical oscillators;
a mixing circuit coupled to each of the first and second quantum mechanical oscillators; and
a quantum error syndrome detection circuit coupled to each of the first and second quantum mechanical oscillators;
at least one controller; and
at least one computer readable medium storing instructions that, when executed by the at least one controller, perform a method comprising:
applying, using the at least one controller, a plurality of drive waveforms to the mixing circuit, the plurality of drive waveforms having different frequencies; and
concurrent with said application of the plurality of drive waveforms, detecting, by the quantum error syndrome detection circuit, a change in energy state of the logical qubit.