Novel Measurements for Annealing Capable Flux Qubits

Quantum Flux Parametron (QFP) based measurements have demonstrated the ability to implement high fidelity z-basis readout for high coherence capacitively shunted flux qubits (CSFQs) at the end of an anneal. This talk discusses alternative QFP readout procedures including: (i) at early times in the anneal, (ii) for other non z-loop currents, and (iii) for Josephson phase slip qubits (JPSQs). It is shown how the POVM (positive-operator valued measure) that characterizes the qubit measurement in these novel regimes can be derived from the final QFP POVM by modeling the dynamics of the coupled QFP-qubit system.