A dual-species Rydberg array of rubidium and cesium atoms

Quantum information processing architectures that leverage multiple modalities of qubits offer compelling strategies for suppressing qubit errors, performing quantum non-demolition measurements, and executing auxiliary-qubit based quantum protocols. In this talk, I will present the latest advances from our dual-species atom array composed of rubidium and cesium atomic qubits. We leverage this two-species approach to demonstrate essential tools for scaling up neutral atom-based processors: mid-circuit readout of atom arrays, real-time processing and feed-forward, and coherent mid-circuit reloading of atomic qubits. In particular, I will discuss how these new tools enable us to use mid-circuit measurements on one atomic species to correct correlated phase errors on the other species all within the execution of a quantum circuit [1]. Finally, I will discuss progress towards combining our feedforward operations with programmable intraspecies and interspecies Rydberg gates, which will enable auxiliary-qubit-assisted protocols as required for quantum error correction and measurement-based state preparation.

[1] K. Singh, C.E. Bradley, S. Anand et al., arXiv:2208.11716 (2022)