RABI OSCILLATIONS AT THREE-PHOTON LASER EXCITATION OF A SINGLE RUBIDIUM RYDBERG ATOM IN AN OPTICAL DIPOLE TRAP

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Abstract

In an experiment on three-photon laser excitation  5S1/2 → 5P3/2 → 6S1/2 → 37P3/2 of a single 87Rb, Rydberg atom in an optical dipole trap, we have observed for the first time three-photon Rabi oscillations between the ground and the Rydberg states. A single atom was detected optically by resonance fluorescence signal using a low-noise sCMOS video camera. The relative probability for the atom to remain in the trap after the action of three synchronized exciting laser pulses with durations varying from 100 ns to 2 µs was measured. A distinctive feature of the experiment was the use of intense laser radiation with a wavelength of 1367 nm at the second excitation step, providing a single-photon Rabi frequency up to 2 GHz to control the effective detunings of intermediate levels of the three- photon transition due to the dynamic Stark effect. Rabi oscillations with frequencies from 1 to 5 MHz were registered depending on the intensity of laser pulses of the first and second excitation steps with coherence time 0.7–0.8 µs. Ways to increase the coherence time and contrast of three-photon Rabi oscillations for applications in quantum information with Rydberg atoms are discussed.

About the authors

I. I Beterov

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University; Novosibirsk State Technical University; Institute of Laser Physics, Siberian Branch of the Russian Academy of Sciences

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090; Novosibirsk, 630073; Novosibirsk, 630090

E. A Yakshina

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University; Institute of Laser Physics, Siberian Branch of the Russian Academy of Sciences

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090;Novosibirsk, 630090

G. Suliman

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090

P. I Betleni

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090

A. A Prilutskaya

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090

D. A Skvortsova

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State Technical University

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630073

T. R Zagirov

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090

D. B Tret'yakov

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090

V. M Entin

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090

N. N Bezuglov

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Saint Petersburg State University

Email: beterov@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Saint Petersburg, 199034

I. I Ryabtsev

Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences; Novosibirsk State University

Author for correspondence.
Email: ryabtsev@isp.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090

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