公开(公告)号：AU2021343288B2

公开(公告)日：2024-05-02

申请号：AU2021343288

申请日：2021-09-17

Applicant: IBM

Inventor： GAMBETTA JAY ,  CHOW JERRY ,  MAGESAN EASWAR ,  KANDALA ABHINAV ,  MINEV ZLATKO

IPC: G06N10/00 ,  G06N10/40

Abstract: Devices and/or computer-implemented methods to facilitate a cross-resonance operation in a dispersive regime of a qubit frequency space are provided. According to an embodiment, a device can comprise a first qubit having a first operating frequency and a first anharmonicity. The device can further comprise a second qubit that couples to the first qubit to perform a cross-resonance operation. The second qubit having a second operating frequency and a second anharmonicity. A detuning between the first operating frequency and the second operating frequency is larger than the first anharmonicity and the second anharmonicity.

公开(公告)号：AU2021399066A9

公开(公告)日：2025-04-03

申请号：AU2021399066

申请日：2021-12-15

Applicant: IBM

Inventor： VAN DEN BERG EWOUT ,  MINEV ZLATKO ,  TEMME PAUL

IPC: G06N10/70

Abstract: Techniques for mitigating readout error for quantum expectation are presented. Calibration component applies first random Pauli gates to qubits at first output of first circuit prior to first readout measurements of the qubits. Estimation component applies second random Pauli gates to qubits at second output of second circuit prior to second readout measurements of the qubits, and generates an error-mitigated readout determination based on first random Pauli gates applied to qubits at first circuit output and second random Pauli gates applied to qubits at second circuit output. Calibration component determines calibration data based on first readout measurements. Estimation component determines estimation data based on second readout measurements. Estimation component determines normalization scalar value based on the calibration data, determines estimation scalar value based on the estimation data, and determines the error-mitigated readout determination associated with a circuit of interest based on the normalization scalar value and estimation scalar value.