A two-species neutral atom qubit array with individual qubit addressing

Jared Miles; Martin Lichtman; Matt Gillette; Abraham Scott; Nathan Neff-Mallon; Austin Belknap; Matt Bedalov; Chengyu Fang; Sanket Deshpande; Mikhail A Kats; Mark Saffman

A two-species neutral atom qubit array with individual qubit addressing

POSTER

Abstract

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.

Publication: C. Fang, J. Miles, J. Goldwin, M. Lichtman, M. Gillette, M. Bergdolt, S. Deshpande, S. A. Norrell, P. Huft, M. A. Kats, and M. Saffman, Interleaved dual-species arrays of single atoms using a passive optical element and one trapping laser, arXiv:2412.20261

Presenters

Mark Saffman

University of Wisconsin - Madison/Infleqtion, University of Wisconsin - Madison/Infleqtion, Inc., Department of Physics, University of Wisconsin - Madison and Infleqtion, Inc., University of Wisconsin - Madison, 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 A Kats

Department of Electrical and Computer Engineering, University of Wisconsin - Madison
Mark Saffman

University of Wisconsin - Madison/Infleqtion, University of Wisconsin - Madison/Infleqtion, Inc., Department of Physics, University of Wisconsin - Madison and Infleqtion, Inc., University of Wisconsin - Madison, University of Wisconsin - Madison and Infleqtion, Inc.