Preparation of qubits
AssigneeRiverlane Ltd
InventorsBen Barber, Jacob M Taylor, Neil Ian Gillespie
Life of this patent
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Abstract
A computer-implemented postselection-free method of initializing qubits in a quantum computer, comprising: preparing at least one data qubit and a plurality of auxiliary qubits in respective initial states, wherein each of the at least one data qubit and the plurality of auxiliary qubits has a respective probability of being prepared with an error; and, performing a plurality of non-measurement multi-qubit quantum logic operations that propagate errors between the at least one data qubit and the plurality of auxiliary qubits so as to reduce the probability of an error affecting the at least one data qubit.
Claims8
A quantum error correction method performed at a quantum computing system comprising a control system and a quantum processing unit having a plurality of qubits, the method comprising:
- preparing, by the control system, at least one syndrome qubit and a plurality of auxiliary qubits of the plurality of qubits in respective initial states, wherein each of the at least one syndrome qubit and the plurality of auxiliary qubits has a respective probability greater than zero and less than one half of being prepared with an error;
- performing, by the control system, a plurality of non-measurement multi-qubit quantum logic operations that propagate errors between the at least one syndrome qubit and the plurality of auxiliary qubits so as to reduce the probability of an error affecting the at least one syndrome qubit;
- and,
- performing, by the control system, syndrome extraction using the at least one syndrome qubit.
A quantum computing system comprising:
- a control system;
- and,
- a quantum processing unit having a plurality of qubits,
- wherein the control system is configured to:
- prepare at least one syndrome qubit and a plurality of auxiliary qubits of the plurality of qubits in respective initial states, wherein each of the at least one syndrome qubit and the plurality of auxiliary qubits has a respective probability greater than zero and less than one half of being prepared with an error;
- perform a plurality of non-measurement multi-qubit quantum logic operations that propagate errors between the at least one syndrome qubit and the plurality of auxiliary qubits so as to reduce the probability of an error affecting the at least one syndrome qubit;
- and
- perform syndrome extraction using the at least one syndrome qubit.
Dependencies are inferred from the claim text.