US 2023/0409942 A1 · Applying Two-qubit Quantum Logic Gates in a Superconducting Quantum Processing Unit

Abstract

In a general aspect, two-qubit quantum gate operations are performed in a superconducting quantum processing unit. In some cases, a flux modulation signal is generated. The flux modulation signal is configured to modulate a transition frequency of a first tunable-frequency qubit device in a superconducting quantum processing unit such that a time average of the transition frequency of the first tunable-frequency qubit device over a duration of the flux modulation signal is on resonance with a transition frequency of a second qubit device in the superconducting quantum processing unit. A two-qubit quantum logic gate is applied to a pair of qubits defined by the first tunable-frequency qubit device and the second qubit device. Applying the two-qubit quantum logic gate includes communicating the flux modulation signal to a flux bias control line coupled to the first tunable-frequency qubit device.

Claims21

Dependent claims

A quantum information control method comprising:

generating, by operation of a control system, a flux modulation signal configured to modulate a transition frequency of a first tunable-frequency qubit device in a superconducting quantum processing unit such that a time average of the transition frequency of the first tunable-frequency qubit device over a duration of the flux modulation signal is on resonance with a transition frequency of a second qubit device in the superconducting quantum processing unit;
and
applying a two-qubit quantum logic gate to a pair of qubits in the superconducting quantum processing unit, wherein applying the two-qubit quantum logic gate comprises communicating the flux modulation signal to a flux bias control line coupled to the first tunable-frequency qubit device, and the pair of qubits comprises a first qubit defined by the first tunable-frequency qubit device and a second qubit defined by the second qubit device.

A quantum computing system comprising:

a superconducting quantum processing unit comprising a first tunable-frequency qubit device and a second qubit device;
and
a control system communicably coupled to the superconducting quantum processing unit, the control system configured to perform operations comprising:
generating a flux modulation signal configured to modulate a transition frequency of the first tunable-frequency qubit device such that a time average of the transition frequency of the first tunable-frequency qubit device over a duration of the flux modulation signal is on resonance with a transition frequency of the second qubit device;
and
applying a two-qubit quantum logic gate to a pair of qubits, wherein applying the two-qubit quantum logic gate comprises communicating the flux modulation signal to a flux bias control line coupled to the first tunable-frequency qubit device, and the pair of qubits comprises a first qubit defined by the first tunable-frequency qubit device and a second qubit defined by the second qubit device.

3 more elements

Dependencies are inferred from the claim text.

Applying Two-qubit Quantum Logic Gates in a Superconducting Quantum Processing Unit

Life of this patent

Applying Two-qubit Quantum Logic Gates in a Superconducting Quantum Processing Unit

Life of this patent

Abstract

Claims21