Laser Cooling of 171Yb+ Ion in Polychromatic Light Field

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Abstract

Standard methods of laser cooling 171Yb+ in a radiofrequency trap involve the use of coherent optical fields resonant to the optical transition of the 2S1/2 → 2P1/2 line, as well as a magnetic field that is used to destroy the coherent population trapping (CPT) appeared at the 2S1/2(F = 1) level. Further precision measurements with use of the clock transitions (quadrupole 2S1/2(F = 0) → 2D3/2(F = 2) and octupole 2S1/2(F = 0) → 2F7/2(F = 2)) require significant suppression and control of residual magnetic fields. In this work, we investigate in detail an alternative method of laser cooling 171Yb+ with use of polychromatic fields, which allows completely eliminate the use of a magnetic field in the ion cooling process and thus suppress Zeeman quadratic shift associated with uncontrolled residual magnetic fields.

About the authors

D. S. Krysenko

Institute of Laser Physics, Russian Academy of Sciences;Novosibirsk State University

Email: oleg.nsu@gmail.com
Novosibirsk, 630090 Russia;Novosibirsk, 630090 Russia

O. N. Prudnikov

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

Author for correspondence.
Email: viyudin@mail.ru
Novosibirsk, 630090 Russia;Novosibirsk, 630090 Russia

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