| CPC H03K 17/92 (2013.01) [G06N 10/40 (2022.01)] | 17 Claims |
|
1. A method for measuring a dispersive shift of a resonator coupled to a qubit, the method comprising:
generating resonator response data, comprising, for each of two computational states of the qubit:
for each of multiple qubit drive frequencies:
for each of multiple resonator drive frequencies:
preparing the qubit in the computational state;
applying a first drive pulse with the resonator drive frequency to the resonator, wherein application of the first drive pulse drives a number of photons into the resonator and causes a shift in a frequency of the qubit coupled to the resonator, the number of photons and size of shift being dependent on the resonator drive frequency;
applying a second drive pulse with the qubit drive frequency to the qubit, wherein application of the second drive pulse causes the qubit to flip the computational state when the qubit drive frequency matches the shifted frequency of the qubit;
measuring the state of the qubit to obtain a measurement result;
providing the measurement result, associated computational state, resonator drive frequency and qubit drive frequency as resonator response data; and
processing the generated resonator response data, comprising calculating a difference between resonator frequencies that correspond to the two computational states of the qubit to determine the dispersive shift of the resonator.
|