Two-atom Rydberg blockade using direct 6$S$ to $nP$ excitation

Two-atom Rydberg blockade using direct 6 $S$ to $n P$ excitation

A. M. Hankin, Y.-Y. Jau, L. P. Parazzoli, C. W. Chou, D. J. Armstrong, A. J. Landahl, and G. W. Biedermann

Phys. Rev. A 89, 033416 – Published 13 March 2014

Abstract

We explore a single-photon approach to Rydberg state excitation and Rydberg blockade. Using detailed theoretical models, we show the feasibility of direct excitation, predict the effect of background electric fields, and calculate the required interatomic distance to observe Rydberg blockade. We then measure and control the electric field environment to enable coherent control of Rydberg states. With this coherent control, we demonstrate Rydberg blockade of two atoms separated by 6.6(3) $μ$ m. When compared with the more common two-photon excitation method, this single-photon approach is advantageous because it eliminates channels for decoherence through photon scattering and ac Stark shifts from the intermediate state while moderately increasing Doppler sensitivity.

Received 13 January 2014

DOI:https://doi.org/10.1103/PhysRevA.89.033416

Authors & Affiliations

A. M. Hankin^1,2, Y.-Y. Jau¹, L. P. Parazzoli¹, C. W. Chou¹, D. J. Armstrong¹, A. J. Landahl^1,2, and G. W. Biedermann^1,2,*

¹Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
²Center for Quantum Information and Control (CQuIC), Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA

^*gbieder@sandia.gov

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Vol. 89, Iss. 3 — March 2014

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