Trapped ion-inspired entangling gate for superconducting qubits*

Quantum simulators of analog and digital varieties rely on the ability to entangle constituent particles with high fidelity. The M{\o}lmer-S{\o}rensen gate underlies much of the success of trapped-ion qubits, allowing for two-qubit entanglement with fidelity greater than 99{\%} and for simultaneous multi-qubit operations. For the ions, qubit-qubit entanglement is achieved via stimulated Raman transitions and through their interaction with a shared phonon mode. We describe the development of a M{\o}lmer-S{\o}rensen inspired gate for superconducting qubits, employing an analogous shared photon mode and a bichromatic driving field to engineer multi-qubit entanglement. This new functionality encourages development of hybrid analog-digital approaches to quantum simulations with superconducting qubit systems.