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+/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:
-
- Univ. of New Mexico, Albuquerque, NM (United States)
- 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:
- Accepted Manuscript
- Journal Name:
- Physical Review A - Atomic, Molecular, and Optical Physics
- 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. https://doi.org/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. https://doi.org/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 - Atomic, Molecular, and Optical Physics},
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}
}
Web of Science
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