Robust quantum logic in neutral atoms via adiabatic Rydberg dressing

Keating, Tyler; Cook, Robert L.; Hankin, Aaron M.; Jau, Yuan -Yu; Biedermann, Grant W.; Deutsch, Ivan H.

doi:10.1103/PhysRevA.91.012337

Robust quantum logic in neutral atoms via adiabatic Rydberg dressing

Journal Article · Tue Jan 27 23:00:00 EST 2015 · Physical Review A - Atomic, Molecular, and Optical Physics

DOI:https://doi.org/10.1103/PhysRevA.91.012337· OSTI ID:1184595

Keating, Tyler ^[1]; Cook, Robert L. ^[2]; Hankin, Aaron M. ^[2]; Jau, Yuan -Yu ^[2]; Biedermann, Grant W. ^[2]; Deutsch, Ivan H. ^[2]

Univ. of New Mexico, Albuquerque, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

We study a scheme for implementing a controlled-Z (CZ) gate between two neutral-atom qubits based on the Rydberg blockade mechanism in a manner that is robust to errors caused by atomic motion. By employing adiabatic dressing of the ground electronic state, we can protect the gate from decoherence due to random phase errors that typically arise because of atomic thermal motion. In addition, the adiabatic protocol allows for a Doppler-free configuration that involves counterpropagating lasers in a σ₊/σ_- orthogonal polarization geometry that further reduces motional errors due to Doppler shifts. The residual motional error is dominated by dipole-dipole forces acting on doubly-excited Rydberg atoms when the blockade is imperfect. As a result, for reasonable parameters, with qubits encoded into the clock states of ¹³³Cs, we predict that our protocol could produce a CZ gate in < 10 μs with error probability on the order of 10^-3.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1184595

Alternate ID(s):: OSTI ID: 1504342
OSTI ID: 1180922

Report Number(s):: SAND--2014-19986J; 547250

Journal Information:: Physical Review A - Atomic, Molecular, and Optical Physics, Journal Name: Physical Review A - Atomic, Molecular, and Optical Physics Journal Issue: 1 Vol. 91; ISSN 1050-2947; ISSN PLRAAN

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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