TY - JOUR

T1 - Implementation of Single-Qubit Quantum Gates Based on a Microwave Transition in a Single Rubidium Atom in an Optical Dipole Trap

AU - Beterov, I. I.

AU - Yakshina, E. A.

AU - Tretyakov, D. B.

AU - Entin, V. M.

AU - Al’yanova, N. V.

AU - Mityanin, K. Yu

AU - Ryabtsev, I. I.

N1 - Funding Information: The work was supported by the Russian Foundation for Basic Research (project no. 19-52-15010) (in terms of the theory of quantum informatics), the Russian Science Foundation (project no. 18-12-00313) (in terms of experimental implementation of quantum operations), the Foundation for Advanced Research (in terms of creating the experimental installation), and Novosibirsk State University. Publisher Copyright: © 2021, Pleiades Publishing, Inc. Copyright: Copyright 2021 Elsevier B.V., All rights reserved. The work was supported by the Russian Foundation for Basic Research (project no. 19-52-15010) (in terms of the theory of quantum informatics), the Russian Science Foundation (project no. 18-12-00313) (in terms of experimental implementation of quantum operations), the Foundation for Advanced Research (in terms of creating the experimental installation), and Novosibirsk State University.

PY - 2021/3

Y1 - 2021/3

N2 - The results of experiments on the implementation of single-qubit quantum gates with a single 87Rb atom in an optical dipole trap with a wavelength of 850 nm are presented. The trap is formed by a long focal-length objective lens located outside the vacuum chamber of a magneto-optical trap. An atom is detected using a resonance fluorescence signal with an sCMOS video camera. The experiments involved the trapping and confinement of a single atom at times up to 50 s, optical pumping by polarized laser radiation, microwave transitions between two hyperfine sublevels of the ground state, and the measurement of the quantum state of the atom by pushing it from the trap. Rabi oscillations are observed during the “clock” microwave transition 5S1/2(F = 2, MF = 0) → 5S1/2(F = 1, MF = 0) between two operating qubit levels at a frequency of up to 4.2 kHz, a contrast of up to 95%, and a coherence time of up to 3 ms. These oscillations correspond to the implementation of two basic single-qubit quantum operations (Hadamard gate, NOT gate) from various initial qubit states with an average fidelity of 95.2 ± 3%.

AB - The results of experiments on the implementation of single-qubit quantum gates with a single 87Rb atom in an optical dipole trap with a wavelength of 850 nm are presented. The trap is formed by a long focal-length objective lens located outside the vacuum chamber of a magneto-optical trap. An atom is detected using a resonance fluorescence signal with an sCMOS video camera. The experiments involved the trapping and confinement of a single atom at times up to 50 s, optical pumping by polarized laser radiation, microwave transitions between two hyperfine sublevels of the ground state, and the measurement of the quantum state of the atom by pushing it from the trap. Rabi oscillations are observed during the “clock” microwave transition 5S1/2(F = 2, MF = 0) → 5S1/2(F = 1, MF = 0) between two operating qubit levels at a frequency of up to 4.2 kHz, a contrast of up to 95%, and a coherence time of up to 3 ms. These oscillations correspond to the implementation of two basic single-qubit quantum operations (Hadamard gate, NOT gate) from various initial qubit states with an average fidelity of 95.2 ± 3%.

UR - http://www.scopus.com/inward/record.url?scp=85105764230&partnerID=8YFLogxK

UR - https://www.elibrary.ru/item.asp?id=46059050

U2 - 10.1134/S1063776121030134

DO - 10.1134/S1063776121030134

M3 - Article

AN - SCOPUS:85105764230

VL - 132

SP - 341

EP - 353

JO - Journal of Experimental and Theoretical Physics

JF - Journal of Experimental and Theoretical Physics

SN - 1063-7761

IS - 3

M1 - 3

ER -