Combined atomic clock with blackbody-radiation-shift-induced instability below 10^-19under natural environment conditions

authored by: V. I. Yudin, A. V. Taichenachev, M. Yu Basalaev, O. N. Prudnikov, H. A. Fürst, T. E. Mehlstaubler, S. N. Bagayev
Abstract: We develop a method of synthetic frequency generation to construct an atomic clock with blackbody radiation (BBR) shift uncertainties below 10-19 at environmental conditions with a very low level of temperature control. The proposed method can be implemented for atoms and ions, which have two different clock transitions with frequencies ν1 and ν2 allowing to form a synthetic reference frequency νsyn = (ν1 - ϵν2)/(1 - ϵ), which is absent in the spectrum of the involved atoms or ions. Calibration coefficient ϵ can be chosen such that the temperature dependence of the BBR shift for the synthetic frequency νsyn has a local extremum at an arbitrary operating temperature T0. This leads to a weak sensitivity of BBR shift with respect to the temperature variations near operating temperature T0. As a specific example, the Yb+ ion is studied in detail, where the utilized optical clock transitions are of electric quadrupole (S → D) and octupole (S → F) type. In this case, temperature variations of ±7 K lead to BBR shift uncertainties of less than 10-19, showing the possibility to construct ultra-precise combined atomic clocks (including portable ones) without the use of cryogenic techniques.
Organisation(s): Institute of Quantum Optics
QuantumFrontiers
External Organisation(s): Novosibirsk State University
RAS - Institute of Laser Physics
Novosibirsk State Technical University
Physikalisch-Technische Bundesanstalt PTB
Type: Article
Journal: New journal of physics
Volume: 23
ISSN: 1367-2630
Publication date: 18.02.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Physics and Astronomy
Electronic version(s): https://doi.org/10.1088/1367-2630/abe160 (Access: Open)

BibTeX

@article{3f21931b3b94441abdb8800751bc99e7,
title = "Combined atomic clock with blackbody-radiation-shift-induced instability below 10-19under natural environment conditions",
abstract = "We develop a method of synthetic frequency generation to construct an atomic clock with blackbody radiation (BBR) shift uncertainties below 10-19 at environmental conditions with a very low level of temperature control. The proposed method can be implemented for atoms and ions, which have two different clock transitions with frequencies ν1 and ν2 allowing to form a synthetic reference frequency νsyn = (ν1 - ϵν2)/(1 - ϵ), which is absent in the spectrum of the involved atoms or ions. Calibration coefficient ϵ can be chosen such that the temperature dependence of the BBR shift for the synthetic frequency νsyn has a local extremum at an arbitrary operating temperature T0. This leads to a weak sensitivity of BBR shift with respect to the temperature variations near operating temperature T0. As a specific example, the Yb+ ion is studied in detail, where the utilized optical clock transitions are of electric quadrupole (S → D) and octupole (S → F) type. In this case, temperature variations of ±7 K lead to BBR shift uncertainties of less than 10-19, showing the possibility to construct ultra-precise combined atomic clocks (including portable ones) without the use of cryogenic techniques.",
keywords = "BBR shift, temperature control, ultra-precise atomic clock",
author = "Yudin, {V. I.} and Taichenachev, {A. V.} and Basalaev, {M. Yu} and Prudnikov, {O. N.} and F{\"u}rst, {H. A.} and Mehlstaubler, {T. E.} and Bagayev, {S. N.}",
year = "2021",
month = feb,
day = "18",
doi = "10.1088/1367-2630/abe160",
language = "English",
volume = "23",
journal = "New journal of physics",
issn = "1367-2630",
publisher = "IOP Publishing Ltd.",
number = "2",
}

Combined atomic clock with blackbody-radiation-shift-induced instability below 10-19under natural environment conditions

Combined atomic clock with blackbody-radiation-shift-induced instability below 10^-19under natural environment conditions