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Poster Session

Poster Session I (4pm-6pm CDT)

4:00 pm – 6:00 pm, Tuesday June 4 Session D00
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A dual-species Rydberg array

Poster 63
Presenter: Shraddha Anand (University of Chicago)
Authors: Conor Bradley (University of Chicago), Ryan White (University of Chicago), Vikram Ramesh (University of Chicago), Kevin Singh (University of Chicago), Hannes Bernien (UChicago)

The imminent frontier for quantum information science is scaling to large system sizes while retaining simple control hardware for primitives such as quantum non-demolition measurement and auxiliary-qubit-based control. In this talk, I will present a dual-species Rydberg tweezer array architecture of rubidium and cesium atoms that enables native crosstalk-free implementations of these protocols, and additionally provides access to new regimes of interactions and dynamics not available in single-species systems [1]. By electrically tuning the Rydberg states close to a Förster resonance [2], we achieve enhanced interspecies interactions and demonstrate the first inter-element Rydberg blockade. Leveraging the blockade, we then generate a Bell state between Rb and Cs hyperfine qubits. The combination of interspecies entanglement with native midcircuit readout [3] further allows the quantum non-demolition measurement of a Rb qubit using an auxiliary Cs qubit. These results demonstrate the building blocks for scalable measurement-based protocols and real-time feedback control in large quantum systems, as required for quantum error correction and measurement-based state preparation.

[1] S. Anand, C.E. Bradley, et al. arXiv:2401.10325 (2024).

[2] I. Beterov and M. Saffman. Phys. Rev. A 92, 042710 (2015).

[3] K. Singh, C.E. Bradley, S. Anand, et al. Science, 380, 1265 (2023).

Funding acknowledgement

We acknowledge funding from the Office of Naval Research 7 (N00014-23-1-2540), the Air Force Office of Scientific Research (FA9550-21-1-0209, 22-RI-EP-19), the NSF QLCI for Hybrid Quantum Architectures and Networks (NSF award 2016136). This material is based upon work supported by the U.S. Department of Energy Office of Science National Quantum Information Science Research Centers. R. W. is supported by the National Science Foundation Graduate Research Fellowship under Grant No. 2140001.

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