Dispersive optical systems for scalable Raman driving of hyperfine qubits

Levine, Harry; Bluvstein, Dolev; Keesling, Alexander; Wang, Tout T.; Ebadi, Sepehr; Semeghini, Giulia; Omran, Ahmed; Greiner, Markus; Vuletić, Vladan; Lukin, Mikhail D.

doi:10.1103/physreva.105.032618

Dispersive optical systems for scalable Raman driving of hyperfine qubits

Journal Article · Tue Mar 29 00:00:00 EDT 2022 · Physical Review A

DOI:https://doi.org/10.1103/physreva.105.032618· OSTI ID:1979612

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Harvard Univ., Cambridge, MA (United States); AWS Center for Quantum Computing, Pasadena, CA (United States); OSTI
Harvard Univ., Cambridge, MA (United States)
Harvard Univ., Cambridge, MA (United States); QuEra Computing Inc., Boston, MA (United States)
Harvard Univ., Cambridge, MA (United States); QuEra Computing Inc., Boston, MA (United States); Google Switzerland GmbH, Zurich (Switzerland)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Hyperfine atomic states are among the most promising candidates for qubit encoding in quantum information processing. In atomic systems, hyperfine transitions are typically driven through a two-photon Raman process by a laser field which is amplitude modulated at the hyperfine qubit frequency. Here we introduce a method for generating amplitude modulation by phase modulating a laser and reflecting it from a highly dispersive optical element known as a chirped Bragg grating. This approach is passively stable, offers high efficiency, and is compatible with high-power laser sources, enabling large Rabi frequencies and improved quantum coherence. We benchmark this approach by globally driving an array of approximately 300 neutral ⁸⁷Rb atomic qubits trapped in optical tweezers and obtain Rabi frequencies of 2 MHz with photon-scattering error rates of less than 2×10^-4 per π pulse. This robust approach can be directly integrated with local addressing optics in both neutral atom and trapped ion systems to facilitate high-fidelity single-qubit operations for quantum information processing.

View Accepted Manuscript (DOE)

Research Organization:: Harvard Univ., Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0021013

OSTI ID:: 1979612

Journal Information:: Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 105; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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