2024/01/18 by Shraddha Anand, Anand, Shraddha, C. E. Bradley +8 · 30 citations
Computer Science · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Cluster state #Cold Atom Physics and Bose-Einstein Condensates #Electrical engineering #FOS: Physical sciences #Ionization #Physics #Quantum #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Quantum computer #Quantum entanglement #Quantum mechanics #Quantum network #Quantum optics and atomic interactions #Quantum teleportation #Qubit #Rydberg atom #Rydberg formula #Topology (electrical circuits)
paper · pdf · doi:10.48550/arxiv.2401.10325
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2024/01/18 · openalex created_date 2024/01/23 · openalex updated_date 2026/07/28
Large-scale Rydberg atom arrays are used for highly coherent analogue quantum simulations and for digital quantum computations. However, advanced quantum protocols, such as quantum error correction, require midcircuit qubit operations, including the replenishment, reset and read-out of a subset of qubits. A compelling strategy for unlocking these capabilities is a dual-species architecture in which a second atomic species is controlled independently and entangled with the first through Rydberg interactions. Here, we realize a dual-species Rydberg array consisting of rubidium and caesium atoms and explore 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 Förster resonance. In this regime, we demonstrate an interspecies Rydberg blockade and implement a quantum state transfer from one species to another. We then generate a Bell state between Rb and Cs hyperfine qubits through an interspecies controlled-phase gate. Finally, we combine interspecies entanglement with a native midcircuit read-out to achieve quantum non-demolition measurements.