Quantum error-correction in microwave integrated quantum circuits
AssigneeRigetti & Co, LLC
InventorsWilliam J. Zeng, Eyob A. Sete, Chad Tyler Rigetti
Life of this patent
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Abstract
In a general aspect, a quantum error-correction technique includes applying a first set of two-qubit gates to qubits in a lattice cell, and applying a second, different set of two-qubit gates to the qubits in the lattice cell. The qubits in the lattice cell include data qubits and ancilla qubits, and the ancilla qubits reside between respective nearest-neighbor pairs of the data qubits. After the first and second sets of two-qubit gates have been applied, measurement outcomes of the ancilla qubits are obtained, and the parity of the measurement outcomes is determined.
Claims20
A quantum error-correction method comprising:
- applying a first set of two-qubit gates to qubits in a lattice cell, the qubits in the lattice cell comprising data qubits and ancilla qubits, the ancilla qubits in the lattice cell residing between respective nearest-neighbor pairs of the data qubits in the lattice cell;
- applying a second, different set of two-qubit gates to the qubits in the lattice cell;
- and
- after applying the first and second sets of two-qubit gates, obtaining measurement outcomes of the ancilla qubits in the lattice cell;
- and
- determining a parity of the measurement outcomes.
A quantum computing system comprising:
- a quantum processor cell comprising a device lattice;
- a control system communicably coupled to the quantum processor cell to control the device lattice, the control system configured to:
- apply a first set of two-qubit gates to qubits in a lattice cell in the device lattice, the qubits in the lattice cell comprising data qubits and ancilla qubits, the ancilla qubits in the lattice cell residing between respective nearest-neighbor pairs of the data qubits in the lattice cell;
- apply a second, different set of two-qubit gates to the qubits in the lattice cell;
- and
- after applying the first and second sets of two-qubit gates, obtaining measurement outcomes of the ancilla qubits in the lattice cell;
- and
- determine a parity of the measurement outcomes.
Dependencies are inferred from the claim text.