Fast quantum feedback using analog integration and control pulse gating
AssigneeInternational Business Machines Corporation
InventorsLev Samuel Bishop, Jay M. Gambetta
Life of this patent
Estimating the term…
Abstract
The technology is generally directed towards a pulse generation component that outputs a control pulse with a timing delay. A qubit state decision component uses an analog kernel to perform a linear filtering operation on (e.g., multiplies and integrates) a qubit signal to obtain a result corresponding to a qubit state, and compares the result to a threshold value to determine a measurement outcome result corresponding to the qubit state. A conditional gate component conditionally gates the control pulse based on the measurement outcome result.
Claims25
A system, comprising:
- a pulse generation component that outputs a control pulse with a timing delay;
- a qubit state decision component that uses an analog kernel to perform a linear filtering operation on a qubit signal to obtain a result corresponding to a qubit state, and that compares the result to a threshold value to determine a measurement outcome result corresponding to the qubit state;
- and
- a conditional gate component that conditionally gates the control pulse based on the measurement outcome result.
A method, comprising:
- generating, by a quantum computer comprising a processor, a pulse that is received at an analog switch;
- determining, by the quantum computer, a qubit state, comprising multiplying a qubit signal by an analog kernel value to obtain a multiplication result, integrating the multiplication result into an integration result, and comparing the integration result to a threshold value to determine a measurement outcome result corresponding to the qubit state;
- and
- operating, by the quantum computer, the analog switch to gate the pulse based on the measurement outcome result.
A system, comprising:
- a qubit control digital to analog converter component that generates a pulse to be received at an analog switch;
- an analog mixing integrating comparing component that determines a qubit state from an experiment, comprising to multiply a qubit signal by an analog kernel to obtain a multiplication result, integrate the multiplication result into an integration result, and compare the integration result to a threshold value to determine a measurement outcome result corresponding to the qubit state;
- and
- the analog switch that gates the pulse based on the measurement outcome result.
A method, comprising:
- outputting a control pulse with a timing delay;
- determining a measurement outcome result corresponding to a state of a qubit, comprising using an analog kernel to perform a linear filtering operation on a qubit signal to obtain a result corresponding to a qubit state, and comparing the result to a threshold value to determine the measurement outcome result corresponding to the qubit state;
- and
- conditionally gating the control pulse based on the measurement outcome result.
A system, comprising:
- a pulse generation component that generates a pulse to be received at an analog switch;
- a qubit state determination component that multiplies a qubit signal by an analog kernel to obtain a multiplication result, integrates the multiplication result into an integration result, and compares the integration result to a threshold value to determine a measurement outcome result corresponding to a qubit state;
- and
- a conditional gate component that gates the pulse at the analog switch based on the measurement outcome result.
Dependencies are inferred from the claim text.