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Poster Session

Poster Session III

4:00 pm – 6:00 pm, Thursday June 19 Session S00 Oregon Convention Center:, Exhibit Hall E
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A two-species neutral atom qubit array with individual qubit addressing

Poster 62
Presenter: Mark Saffman (Department of Physics, University of Wisconsin - Madison and Infleqtion, Inc.)
Authors: Jared Miles (Infleqtion, Inc.), Martin Lichtman (Infleqtion, Inc.), Matt Gillette (Infleqtion, Inc.), Abraham Scott (Infleqtion, Inc.), Nathan Neff-Mallon (Infleqtion, Inc.), Austin Belknap (Infleqtion, Inc.), Matt Bedalov (Infleqtion, Inc.), Chengyu Fang (Department of Electrical and Computer Engineering, University of Wisconsin-Madison), Sanket Deshpande (Department of Electrical and Computer Engineering, University of Wisconsin - Madison), Mikhail Kats (Department of Electrical and Computer Engineering, University of Wisconsin - Madison)

Infleqtion's Sqale Error Correction Testbed is a neutral atom quantum computer designed to enable error correcting codes via mid-circuit measurement. The system is comprised of a 2D array of Cs and Rb qubits, loaded stochastically and rearranged into deterministically loaded logical qubit plaquettes. Species-specific readout allows syndrome measurements on Rb while Cs data qubits are protected. Both Rb and Cs are fully addressable for local gates and pairwise Cs+Rb entangling gates. Local gates are achieved via a combination of differential light shift induced Rz, and global microwave Rx and Ry. Entangling gates are achieved via Rydberg interactions, with Cs excited to Rydberg levels via a 2-photon 459 nm + 1040 nm process, while Rb is excited via 421 nm + 1005 nm. We have demonstrated independent readout and CZ entangling gates on Cs + Rb pairs and are progressing toward logical qubit operations on this system.

Funding acknowledgement

Work at UWM was supported by the U.S. Department of Energy Office of Science National Quantum Information Science Research Centers as well as support from NSF Award 2016136 for the QLCI center Hybrid Quantum Architectures and Networks, and NSF award 2210437.

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