A Platform for High-Fidelity Microwave and Optical Control of 85Rb Qubits

Within the TU/e Kat-1 team, we aim to realize an implementation of a full-stack hybrid quantum computer. At its core, our quantum processor is based on neutral rubidium-85 atoms confined in optical tweezers, with qubit states encoded in the hyperfine splitting of the ground state. <br/><br/>Within this poster, we present our plans and initial results of an upgraded experimental setup aimed at achieving higher gate fidelities. Key improvements include the design of a new four-coil configuration for driving global microwave transitions with arbitrary polarization and increased homogeneity. In addition, we introduce an alignment-free, dual-wavelength local addressing system based on shared acousto-optical deflectors. This system suppresses beam-pointing instabilities between the addressing and trapping beams. Together, these developments are expected to enhance the robustness and fidelity of both our global and local qubit operations.