Demonstration of a Multi-Qubit Gate for All-to-All Connected Superconducting Qubits*

Exploring highly connected networks of qubits is invaluable for implementing various quantum codes and simulations. All-to-all connectivity allows for entangling qubits with reduced gate depth. In the trapped-ion qubit community, the Mølmer-Sørensen gate is routinely used to entangle over a dozen qubits with high fidelity. We implement a Mølmer-Sørensen-like interaction through the use of shared coplanar waveguide (CPW) resonators to couple multiple superconducting qubits. We present two-qubit and multi-qubit experiments and detail sources of errors and prospects for scalability.