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 results from our dual-species atom array composed of individually controlled rubidium and cesium atomic qubits. Using species-selective trapping, we demonstrate independent placement of single rubidium and cesium atoms in arbitrary geometries up to 512 trapping sites and observe negligible crosstalk [1]. This negligible crosstalk enables reloading of one set of atomic qubits into the array while maintaining quantum coherence in the other, paving the way towards continuous-mode operation of atom array processors. Furthermore, I will discuss how we use mid-circuit measurements on one atomic species to perform corrections or apply quantum gates on the other species all within the execution of a quantum circuit [2]. Combining these feedforward operations with programmable intraspecies and interspecies Rydberg gates will enable auxiliary-qubit-assisted protocols, as required for quantum error correction and measurement-based state preparation.



[1] K. Singh et al. Phys. Rev. X 12, 011040 (2022)

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