Neutral-atom entanglement using adiabatic Rydberg dressing

Journal Article · Thu Jun 15 00:00:00 EDT 2023 · Physical Review A

DOI:https://doi.org/10.1103/physreva.107.062609· OSTI ID:2475606

Mitra, Anupam ^[1]; Omanakuttan, Sivaprasad ^[1]; Martin, Michael J. ^[2]; Biedermann, Grant W. ^[3]; Deutsch, Ivan H. ^[1]

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1. Univ. of New Mexico, Albuquerque, NM (United States)
2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
3. Univ. of Oklahoma, Norman, OK (United States)

Here we revisit the implementation of a two-qubit entangling gate, the Mølmer-Sørensen gate, using the adiabatic Rydberg dressing paradigm for neutral atoms as studied in [A. Mitra et al., Phys. Rev. A 101, 030301(R) (2020)]. We study the implementation of rapid adiabatic passage using a two-photon transition, which does not require the use of an ultraviolet laser, and can be implemented using only amplitude modulation of one field with all laser frequencies fixed. We find that entangling gate fidelities, comparable to the one-photon excitation, are achievable with the two-photon excitation. Moreover, we address how the adiabatic dressing protocol can be used to implement entangling gates outside the regime of a perfect Rydberg blockade. We show that, by using adiabatic dressing, we can achieve scaling of the gate fidelity set by the fundamental limits to entanglement generated by the Rydberg interactions while simultaneously retaining a limited population in the doubly excited Rydberg state. This allows for fast high-fidelity gates for atoms separated beyond the blockade radius.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: 89233218CNA000001
• OSTI ID: 2475606
• Alternate ID(s): OSTI ID: 1985313
• Report Number(s): LA-UR--22-24775
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 107; ISSN 2469-9926
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
Entanglement production
Quantum gates