Patent ID: 11893454
Assignee: RIGETTI & CO, LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method of performing quantum error correction in a quantum computing system comprising a quantum processor cell, a signal delivery system, and a control system, the method comprising:
encoding information in data qubits in a three-dimensional device lattice in the quantum processor cell, the data qubits residing in multiple layers of the three-dimensional device lattice, each layer comprising a respective two-dimensional device lattice,
wherein the three-dimensional device lattice comprises devices whose collective spatial arrangement corresponds to a three-dimensional lattice structure, and the two-dimensional device lattices comprise devices whose collective spatial arrangements correspond to respective two-dimensional lattice structures;
by operation of the control system:
applying a three-dimensional color code in the three-dimensional device lattice to detect errors in the data qubits residing in the multiple layers;
selecting a two-dimensional target boundary face of the three-dimensional color code to perform dimensional reduction, the two-dimensional target boundary face comprising a first subset of the data qubits;
measuring a gauge syndrome on a second, distinct subset of the data qubits in the three-dimensional device lattice;
inferring a two-dimensional syndrome of the two-dimensional target boundary face such that quantum information is transferred from the three-dimensional color code to the two-dimensional target boundary face of the three-dimensional color code,
deallocating the second, distinct subset of the data qubits from the three-dimensional color code; and
applying a two-dimensional color code in the two-dimensional target boundary face,

wherein the signal delivery system transfers signals between the quantum processor cell and the control system.