Quantum solver for multi-objective function black-box optimization

A computer-implemented method comprising:

• initializing, by a system operatively coupled to a processor, circuit parameters for an ansatz quantum circuit in a quantum computer;
• measuring, by the system, a plurality of bitstrings from a state of the quantum circuit;
• determining, by the system, a subset of bitstrings comprising feasible Pareto-efficient elements of the plurality of bitstrings;
• determining, by the system, a hypervolume based on the subset of bitstrings;
• and
• updating, by the system, the circuit parameters to increase indices of the hypervolume.

A computer program product, comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• initialize, by the processor, circuit parameters for an ansatz quantum circuit in a quantum computer;
• measure, by the processor, a plurality of bitstrings from a state of the quantum circuit;
• determining, by the processor, a subset of bitstrings comprising feasible Pareto-efficient elements of the plurality of bitstrings;
• determining, by the processor, a hypervolume based on the subset of bitstrings;
• and
• update, by the processor, the circuit parameters to increase indices of the hypervolume.