Entangling atomic spins with a Rydberg-dressed spin-flip blockade

Jau, Y. -Y.; Hankin, A. M.; Keating, T.; Deutsch, I. H.; Biedermann, G. W.

doi:10.1038/nphys3487

Title: Entangling atomic spins with a Rydberg-dressed spin-flip blockade

Journal Article · Mon Oct 05 00:00:00 EDT 2015 · Nature Physics

DOI:https://doi.org/10.1038/nphys3487· OSTI ID:1347349

Jau, Y. -Y. ^[1]; Hankin, A. M. ^[1]; Keating, T. ^[1]; Deutsch, I. H. ^[1]; Biedermann, G. W. ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States). Center for Quantum Information and Control (CQuIC)

Controlling the quantum entanglement between parts of a many-body system is key to unlocking the power of quantum technologies such as quantum computation, high-precision sensing, and the simulation of many-body physics. The spin degrees of freedom of ultracold neutral atoms in their ground electronic state provide a natural platform for such applications thanks to their long coherence times and the ability to control them with magneto-optical fields. However, the creation of strong coherent coupling between spins has been challenging. In this paper, we demonstrate a strong and tunable Rydberg-dressed interaction between spins of individually trapped caesium atoms with energy shifts of order 1 MHz in units of Planck’s constant. This interaction leads to a ground-state spin-flip blockade, whereby simultaneous hyperfine spin flips of two atoms are inhibited owing to their mutual interaction. Finally, we employ this spin-flip blockade to rapidly produce single-step Bell-state entanglement between two atoms with a fidelity ≥81(2)%.

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

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)

Grant/Contract Number:: AC04-94AL85000; NSF-1212445

OSTI ID:: 1347349

Report Number(s):: SAND-2015-0130J; nphys3487

Journal Information:: Nature Physics, Vol. 12, Issue 1; ISSN 1745-2473

Publisher:: Nature Publishing Group (NPG)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 248 works

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Single-step implementation of high fidelity $n$-bit Toffoli gate Rasmussen, S. E.; Groenland, K.; Gerritsma, R. arXiv https://doi.org/10.48550/arxiv.1910.07548	text	January 2019
Transverse-Field Ising Dynamics in a Rydberg-Dressed Atomic Gas Borish, Victoria; Marković, Ognjen; Hines, Jacob A. arXiv https://doi.org/10.48550/arxiv.1910.13687	text	January 2019
Many-Body Physics with Individually-Controlled Rydberg Atoms Browaeys, Antoine; Lahaye, Thierry arXiv https://doi.org/10.48550/arxiv.2002.07413	text	January 2020
Single-site Rydberg addressing in 3D atomic arrays for quantum computing with neutral atoms Shi, Xiao-Feng arXiv https://doi.org/10.48550/arxiv.2102.00341	text	January 2021

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