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Title: Robust quantum logic in neutral atoms via adiabatic Rydberg dressing

Abstract

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 +- 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.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of New Mexico, Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1184595
Alternate Identifier(s):
OSTI ID: 1180922
Report Number(s):
SAND-2014-19986J
Journal ID: ISSN 1050-2947; PLRAAN; 547250
Grant/Contract Number:
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 91; Journal Issue: 1; Journal ID: ISSN 1050-2947
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Keating, Tyler, Cook, Robert L., Hankin, Aaron M., Jau, Yuan -Yu, Biedermann, Grant W., and Deutsch, Ivan H.. Robust quantum logic in neutral atoms via adiabatic Rydberg dressing. United States: N. p., 2015. Web. doi:10.1103/PhysRevA.91.012337.
Keating, Tyler, Cook, Robert L., Hankin, Aaron M., Jau, Yuan -Yu, Biedermann, Grant W., & Deutsch, Ivan H.. Robust quantum logic in neutral atoms via adiabatic Rydberg dressing. United States. doi:10.1103/PhysRevA.91.012337.
Keating, Tyler, Cook, Robert L., Hankin, Aaron M., Jau, Yuan -Yu, Biedermann, Grant W., and Deutsch, Ivan H.. Wed . "Robust quantum logic in neutral atoms via adiabatic Rydberg dressing". United States. doi:10.1103/PhysRevA.91.012337. https://www.osti.gov/servlets/purl/1184595.
@article{osti_1184595,
title = {Robust quantum logic in neutral atoms via adiabatic Rydberg dressing},
author = {Keating, Tyler and Cook, Robert L. and Hankin, Aaron M. and Jau, Yuan -Yu and Biedermann, Grant W. and Deutsch, Ivan H.},
abstractNote = {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.},
doi = {10.1103/PhysRevA.91.012337},
journal = {Physical Review. A},
number = 1,
volume = 91,
place = {United States},
year = {Wed Jan 28 00:00:00 EST 2015},
month = {Wed Jan 28 00:00:00 EST 2015}
}

Journal Article:
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Cited by: 19 works
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