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<i>In Situ</i> Characterization of Qubit Control Lines: A Qubit as a Vector Network Analyzer

<i>In Situ</i> Characterization of Qubit Control Lines: A Qubit as a Vector Network Analyzer

We propose and experimentally realize a technique to measure the transfer function of a control line in the frequency domain using a qubit as a vector network analyzer. Our method requires coupling the line under test to the longitudinal component of the Hamiltonian of the qubit and the ability to …