Granted Patent B2

US 12,242,926 · App. 18/439,236 · Granted Mar 4, 2025

Inventors: Ciaran Ryan-Anderson (Broomfield, CO); Dominic Lucchetti (Louisville, CO); Gerald Chambers (Longmont, CO); Jason Formo (Brooklyn Park, MN); Thomas Skripka (Arvada, CO)

Assignee: Quantinuum LLC

G06N10/70

Abstract

Claims (46)

1. A quantum system controller comprising:

one or more processing elements;

at least one memory storing executable instructions; and

a plurality of driver controller elements, each driver controller element configured to control operation of a respective component of a quantum computer,

wherein the executable instructions are configured to, when executed by the one or more processing elements, cause the quantum system controller to at least:

cause one or more syndrome extractions to be performed on a logical qubit to generate one or more respective syndromes;

cause the one or more respective syndromes to be processed using a decoding algorithm to generate an updated software-tracked Pauli frame corresponding to the logical qubit; and

cause the updated software-tracked Pauli frame to be stored in the at least one memory.

2. The quantum system controller of claim 1 , wherein the executable instructions are further configured to, when executed by the one or more processing elements, cause the quantum system controller to perform at least one of (a) determining a correction to be applied to at least one data qubit of the logical qubit based at least in part on the updated software-tracked Pauli frame or (b) selecting one or more non-Clifford gates to be performed on at least one data qubit of the logical qubit based at least in part on the updated software-tracked Pauli frame.

3. The quantum system controller of claim 2 , wherein the performance of the at least one of (a) the determining the correction or (b) selecting the one or more non-Clifford gates is responsive to determining that a first non-Clifford gate is to be performed on the logical qubit.

4. The quantum system controller of claim 3 , wherein the executable instructions are further configured to, when executed by the one or more processing elements, cause the quantum system controller to, cause the correction to be physically applied to at least one data qubit of the logical qubit and then cause the first non-Clifford gate to be performed on the logical qubit.

5. The quantum system controller of claim 3 , wherein the executable instructions are further configured to, when executed by the one or more processing elements, cause the quantum system controller to, cause performance of the first non-Clifford gate on the logical qubit by performing the one or more non-Clifford gates on the logical qubit.

6. The quantum system controller of claim 1 , wherein the executable instructions are configured to, when executed by the one or more processing elements, cause the quantum system controller to at least:

cause performance of one or more gates on the logical qubit;

cause one or more additional syndrome extractions to be performed on the logical qubit to generate one or more respective additional syndromes;

cause the one or more respective additional syndromes to be processed using a decoding algorithm to generate a further updated software-tracked Pauli frame corresponding to the logical qubit; and

cause the further updated software-tracked Pauli frame to be stored in the at least one memory.

7. The quantum system controller of claim 1 , wherein the logical qubit is one of a plurality of logical qubits and respective software-tracked Pauli frames corresponding to each of the plurality of logical qubits are stored in the at least one memory.

8. The quantum system controller of claim 1 , wherein the logical qubit is formed of a plurality of data qubits that are maintained by the quantum computer.

9. The quantum system controller of claim 1 , wherein performing the syndrome extraction includes processing an optical signal corresponding to at least one ancilla qubit.

10. The quantum system controller of claim 9 , wherein the optical signal corresponding to the at least one ancilla qubit is captured in response to performing a reading operation on the at least one ancilla qubit after causing one or more interactions between the at least one ancilla qubit and one or more data qubits of the logical qubit.

11. The quantum system controller of claim 10 , wherein the one or more interactions between the at least one ancilla qubit and the one or more data qubits of the logical qubit do not affect quantum information stored by the one or more data qubits.

12. The quantum system controller of claim 1 , wherein the one or more processing elements comprise at least one first processing element of a processing device and one or more second processing elements of a time-indexed command (TIC) sequencer and the at least one memory comprises one or more buffers, wherein the TIC sequencer is configured to buffer commands in the one or more buffers for time-indexed execution of the commands by respective driver controller elements of the plurality of driver controller elements.

13. The quantum system controller of claim 12 , wherein the one or more buffers are first-in first-out buffers.

14. The quantum system controller of claim 12 , wherein an indication that a respective syndrome of the one or more respective syndromes is stored in the at least one memory is stored to a buffer of the at least on memory responsive to the respective syndrome being stored in the at least one memory.

15. The quantum system controller of claim 14 , wherein the indication includes a location at which the respective syndrome is stored in the at least one memory.

16. The quantum system controller of claim 14 , wherein responsive to determining that the indication that the respective syndrome is stored in the at least one memory is present in the buffer, the first processing element causes the respective syndrome to be loaded into program memory and the indication that the respective syndrome is stored in the at least on memory is reset.

17. The quantum system controller of claim 12 , further comprising a time generator configured to provide synchronizing signals to the TIC sequencer and each of the plurality of driver controller elements, the synchronizing signals configured to cause synchronized execution of two or more time-indexed commands by respective driver controller elements of the plurality of driver controller elements at a respective time.

18. A system comprising:

an atomic object confinement apparatus configured to confine a plurality of atomic objects;

one or more voltage sources;

one or more manipulation sources;

an optics collection system; and

a quantum system controller configured to control operation of the one or more voltage sources and the one or more manipulation sources and to receive signals from the optics collection system, the quantum system controller comprising:

one or more processing elements;

at least one memory storing executable instructions; and

a plurality of driver controller elements, each driver controller element configured to control operation of a respective component of the system,

wherein the executable instructions are configured to, when executed by the one or more processing elements, cause the quantum system controller to at least:

control operation of the one or more voltage sources and the one or more manipulation sources to cause one or more syndrome extractions to be performed on a logical qubit to generate one or more respective syndromes;

cause the one or more respective syndromes to be processed using a decoding algorithm to generate an updated software-tracked Pauli frame corresponding to the logical qubit; and

cause the updated software-tracked Pauli frame to be stored in the at least one memory.

19. The system of claim 18 , wherein the executable instructions are further configured to, when executed by the one or more processing elements, cause the quantum system controller to perform at least one of (a) determining a correction to be applied to at least one data qubit of the logical qubit based at least in part on the updated software-tracked Pauli frame or (b) selecting one or more non-Clifford gates to be performed on at least one data qubit of the logical qubit based at least in part on the updated software-tracked Pauli frame.

20. A method performed by a quantum system controller, the method comprising:

causing one or more syndrome extractions to be performed on a logical qubit to generate one or more respective syndromes;

causing the one or more respective syndromes to be processed using a decoding algorithm to generate an updated software-tracked Pauli frame corresponding to the logical qubit; and

causing the updated software-tracked Pauli frame to be stored in a memory of the quantum system controller.

Assignments (4)

Continuity (3)

References Cited (38)