A dual-species Rydberg array

Abstract

Rydberg atom arrays have emerged as a leading platform for quantum information science. Reaching system sizes of hundreds of long-lived qubits, these arrays are used for highly coherent analog quantum simulation, as well as digital quantum computation. Advanced quantum protocols such as quantum error correction, however, require midcircuit qubit operations, including the replenishment, reset, and readout of a subset of qubits. A compelling strategy to achieve these capabilities is a dual-species architecture in which a second atomic species can be controlled without crosstalk, and entangled with the first via Rydberg interactions. Here, we realize a dual-species Rydberg array consisting of rubidium (Rb) and cesium (Cs) atoms, and explore new regimes of interactions and dynamics not accessible in single-species architectures. We achieve enhanced interspecies interactions by electrically tuning the Rydberg states close to a Forster resonance. In this regime, we demonstrate interspecies Rydberg blockade and implement quantum state transfer from one species to another. We then generate a Bell state between Rb and Cs hyperfine qubits via an interspecies controlled-phase gate. Finally, we combine interspecies entanglement with native midcircuit readout to achieve quantum non-demolition measurement of a Rb qubit using an auxiliary Cs qubit. The techniques demonstrated here pave the way toward scalable measurement-based protocols and real-time feedback control in large-scale quantum systems.

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• Observation of anomalous information scrambling in a Rydberg atom array
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• A hybrid atom tweezer array of nuclear spin and optical clock qubits
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• Tricritical Kibble-Zurek scaling in Rydberg atom ladders
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• Compact optical waveform generator with digital feedback
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• Concomitant Entanglement and Control Criticality Driven by Collective Measurements
• Unravelling the Structures in the van der Waals Interactions of Alkali Rydberg Atoms
• Dark spin-cats as biased qubits
• Multi-Qubit Parity Gates for Rydberg Atoms in Various Configurations
• Low-depth quantum error correction via three-qubit gates in Rydberg atom arrays
• Quantum permutation puzzles with indistinguishable particles
• A Compact Dual-Beam Zeeman Slower for High-Flux Cold Atoms
• Probing spin-motion coupling of two Rydberg atoms by a Stern-Gerlach-like experiment
• Heralded photonic graph states with inefficient quantum emitters
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• Tailoring interaction ranges in atom arrays
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