• Rapid Communication

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

Anupam Mitra, Michael J. Martin, Grant W. Biedermann, Alberto M. Marino, Pablo M. Poggi, and Ivan H. Deutsch
Phys. Rev. A 101, 030301(R) – Published 20 March 2020

Abstract

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. 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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 10 December 2019
  • Accepted 18 February 2020

DOI:https://doi.org/10.1103/PhysRevA.101.030301

©2020 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Anupam Mitra1,2,*, Michael J. Martin3,4, Grant W. Biedermann1,4,5, Alberto M. Marino5,4, Pablo M. Poggi1,2, and Ivan H. Deutsch1,2,†

  • 1Center for Quantum Information and Control, University of New Mexico, Albuquerque, New Mexico 87131, USA
  • 2Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87106, USA
  • 3Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 4Sandia National Laboratories, Albuquerque, New Mexico 87123, USA
  • 5Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019, USA

  • *anupam@unm.edu
  • ideutsch@unm.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 3 — March 2020

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×