TY - JOUR

T1 - Analysis of nonresonant effects in the two-photon spectroscopy of helium

AU - Zalialiutdinov, T.

AU - Anikin, A.

AU - Solovyev, D.

N1 - Publisher Copyright: © 2021 IOP Publishing Ltd.

PY - 2021/8/18

Y1 - 2021/8/18

N2 - In the present paper, we study nonresonant corrections for experimental measurements of the transition frequencies in the helium atom. Having attracted more attention, such effects can make a significant contribution to experiments based on one- and two-photon atomic spectroscopy. The quantum interference effects in the measurements of n 3 S 1 - 33 D 1 (n = 3, 4, 5) transition frequencies based on Doppler-free two-photon spectroscopy, are considered as a possible source of current discrepancy between the experimental and theoretical data. We demonstrate that line profile asymmetry caused by the quantum interference of fine sub-levels of the 3DJ (J=1,2,3) state can reach tenths of a megahertz for different experimental conditions. Thus, previously unaccounted nonresonant corrections should be taken in next-generation experimental measurements of transitions frequencies in helium. However, they could not completely eliminate the current imbalance in the study of helium spectra and the question is still open.

AB - In the present paper, we study nonresonant corrections for experimental measurements of the transition frequencies in the helium atom. Having attracted more attention, such effects can make a significant contribution to experiments based on one- and two-photon atomic spectroscopy. The quantum interference effects in the measurements of n 3 S 1 - 33 D 1 (n = 3, 4, 5) transition frequencies based on Doppler-free two-photon spectroscopy, are considered as a possible source of current discrepancy between the experimental and theoretical data. We demonstrate that line profile asymmetry caused by the quantum interference of fine sub-levels of the 3DJ (J=1,2,3) state can reach tenths of a megahertz for different experimental conditions. Thus, previously unaccounted nonresonant corrections should be taken in next-generation experimental measurements of transitions frequencies in helium. However, they could not completely eliminate the current imbalance in the study of helium spectra and the question is still open.

KW - atomic spectroscopy

KW - helium spectra

KW - line profile

KW - QED theory

KW - quantum interference

KW - RYDBERG CONSTANT

KW - LIFETIMES

KW - HYDROGEN

KW - STATES

KW - FREQUENCY

KW - ATOMS

KW - DEUTERIUM

UR - https://arxiv.org/abs/2103.14365

UR - http://www.scopus.com/inward/record.url?scp=85115913115&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/b2624b99-9d53-3b98-b9d2-d1d73ec87c88/

U2 - 10.1088/1361-6455/ac232c

DO - 10.1088/1361-6455/ac232c

M3 - Article

AN - SCOPUS:85115913115

VL - 54

JO - Journal of the European Optical Society Part B: Quantum Optics

JF - Journal of the European Optical Society Part B: Quantum Optics

SN - 0953-4075

IS - 16

M1 - 165002

ER -