Robust Mølmer-Sørensen gate for neutral atoms using rapid adiabatic Rydberg dressing

Mitra, Anupam; Martin, Michael J.; Biedermann, Grant W.; Marino, Alberto M.; Poggi, Pablo M.; Deutsch, Ivan H.

doi:10.1103/physreva.101.030301

Robust Mølmer-Sørensen gate for neutral atoms using rapid adiabatic Rydberg dressing

Journal Article · Fri Mar 20 00:00:00 EDT 2020 · Physical Review A

DOI:https://doi.org/10.1103/physreva.101.030301· OSTI ID:1699458

Mitra, Anupam ^[1]; ^[2]; Biedermann, Grant W. ^[3]; Marino, Alberto M. ^[4]; Poggi, Pablo M. ^[1]; ^[1]

Univ. of New Mexico, Albuquerque, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Univ. of New Mexico, Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Oklahoma, Norman, OK (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Oklahoma, Norman, OK (United States)

The Rydberg blockade mechanism is now routinely considered for entangling qubits encoded in clock states of neutral atoms. Challenges towards implementing entangling gates with high fidelity include errors due to thermal motion of atoms, laser amplitude inhomogeneities, and imperfect Rydberg blockade. Here, we show that adiabatic rapid passage by Rydberg dressing provides a mechanism for implementing two-qubit entangling gates by accumulating phases that are robust to these imperfections. We find that the typical error in implementing a two-qubit gate, such as the controlled phase gate, is dominated by errors in the single-atom light shift, and that this can be easily corrected using adiabatic dressing interleaved with a simple spin echo sequence. This results in a two-qubit Mølmer-Sørensen gate. A gate fidelity ~ 0.995 is achievable with modest experimental parameters and a path to higher fidelities is possible for Rydberg states in atoms with a stronger blockade, longer lifetimes, and larger Rabi frequencies.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)

Grant/Contract Number:: 89233218CNA000001; NA0003525

OSTI ID:: 1699458

Alternate ID(s):: OSTI ID: 1605628
OSTI ID: 1769917

Report Number(s):: LA-UR--19-31221

Journal Information:: Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 101; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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