Read out of quantum states of microwave frequency qubits with optical frequency photons

    公开(公告)号:GB2567080A

    公开(公告)日:2019-04-03

    申请号:GB201900518

    申请日:2017-06-20

    Applicant: IBM

    Abstract: Techniques relate to reading a qubit coupled to a microwave resonator.A microwave signal at a microwave resonator frequency is input to the microwave resonator that couples to the qubit. A microwave readout signal from the microwave resonator is output to a microwave to optical converter. The microwave readout signal includes a qubit state of the qubit. The microwave to optical converter is configured to convert the microwave readout signal to an optical signal. In response to the optical signal being output by the microwave to optical converter, it is determined that the qubit is in a predefined qubit state. In response to no optical signal being output by the microwave to optical converter, it is determined that the qubit is not in the predefined qubit state.

    Cavity filtered qubit circuit
    12.
    发明专利

    公开(公告)号:GB2557828B

    公开(公告)日:2018-11-21

    申请号:GB201805766

    申请日:2016-07-12

    Applicant: IBM

    Abstract: A technique relates to a microwave device. A qubit is connected to a first end of a first coupling capacitor and a first end of a second coupling capacitor. A resonator is connected to a second end of the first coupling capacitor and a second end of the second coupling capacitor. The resonator includes a fundamental resonance mode. A filter is connected to both the qubit and the first end of the first or second coupling capacitor.

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