Entangling atomic spins with a Rydberg-dressed spin-flip blockade
Abstract
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)%.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States). Center for Quantum Information and Control (CQuIC)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)
- OSTI Identifier:
- 1347349
- Report Number(s):
- SAND-2015-0130J
Journal ID: ISSN 1745-2473; nphys3487
- Grant/Contract Number:
- AC04-94AL85000; NSF-1212445
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Physics
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 1; Journal ID: ISSN 1745-2473
- Publisher:
- Nature Publishing Group (NPG)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Quantum information; Qubits
Citation Formats
Jau, Y. -Y., Hankin, A. M., Keating, T., Deutsch, I. H., and Biedermann, G. W. Entangling atomic spins with a Rydberg-dressed spin-flip blockade. United States: N. p., 2015.
Web. doi:10.1038/nphys3487.
Jau, Y. -Y., Hankin, A. M., Keating, T., Deutsch, I. H., & Biedermann, G. W. Entangling atomic spins with a Rydberg-dressed spin-flip blockade. United States. doi:10.1038/nphys3487.
Jau, Y. -Y., Hankin, A. M., Keating, T., Deutsch, I. H., and Biedermann, G. W. Mon .
"Entangling atomic spins with a Rydberg-dressed spin-flip blockade". United States. doi:10.1038/nphys3487. https://www.osti.gov/servlets/purl/1347349.
@article{osti_1347349,
title = {Entangling atomic spins with a Rydberg-dressed spin-flip blockade},
author = {Jau, Y. -Y. and Hankin, A. M. and Keating, T. and Deutsch, I. H. and Biedermann, G. W.},
abstractNote = {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)%.},
doi = {10.1038/nphys3487},
journal = {Nature Physics},
number = 1,
volume = 12,
place = {United States},
year = {2015},
month = {10}
}
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