Demonstration of tunable three-body interactions between superconducting qubits

Understand

Nonpairwise multi-qubit interactions present a useful resource for quantum information processors.

• Their implementation would facilitate more efficient quantum simulations of molecules and combinatorial optimization problems, and they could simplify error suppression and error correction schemes.
• Here we present a superconducting circuit architecture in which a coupling module mediates 2-local and 3-local interactions between three flux qubits by design.
• The system Hamiltonian is estimated via multi-qubit pulse sequences that implement Ramsey-type interferometry between all neighboring excitation manifolds in the system.