Quantum Computing using Rb and Cs

As a pathway to unlocking fast mid-circuit measurement for error correction readout, Infleqtion is developing a dual-species neutral atom quantum computer testbed. This system uses a 2D array of rubidium and cesium qubits. Independent laser and microwave systems allow for control of both species, while Rydberg blockade gates provide entangling gates between the species. We will present calculations and data for strong Rb-Cs blockade interactions, and demonstration of the resulting 97.5% fidelity entangling gates.