TY - JOUR

T1 - The role of line profile asymmetry in precision spectroscopy

AU - Solovyev, Dmitry A.

AU - Zalialiutdinov, Timur A.

AU - Anikin, Aleksei A.

AU - Labzowsky, Leonti N.

PY - 2025/2/19

Y1 - 2025/2/19

N2 - In this review, we have investigated the asymmetry of the line profile in precision one- and two-photon spectroscopy of hydrogen and helium atoms within the framework of a rigorous QED approach. A detailed analysis of the angular correlations of the quantum interference effect has been carried out using various examples. Nonresonant effects are also considered in relation to some astrophysical problems. In particular, a rigorous QED derivation of the nonresonant extension for the Lorentz line profile is given using the Ly α transition as an example; such a QED derivation has been lacking in the literature.

AB - In this review, we have investigated the asymmetry of the line profile in precision one- and two-photon spectroscopy of hydrogen and helium atoms within the framework of a rigorous QED approach. A detailed analysis of the angular correlations of the quantum interference effect has been carried out using various examples. Nonresonant effects are also considered in relation to some astrophysical problems. In particular, a rigorous QED derivation of the nonresonant extension for the Lorentz line profile is given using the Ly α transition as an example; such a QED derivation has been lacking in the literature.

KW - Atomic transitions

KW - Frequency measurements

KW - Line profile

KW - Multiphoton processes

KW - Precision spectroscopy

KW - Quantum electrodynamics

KW - S-matrix

UR - https://www.mendeley.com/catalogue/23f5a03b-7d32-3021-b6c1-0b3760edc6b2/

U2 - 10.1016/j.physrep.2025.02.001

DO - 10.1016/j.physrep.2025.02.001

M3 - Article

VL - 1114

SP - 1

EP - 40

JO - Physics Reports

JF - Physics Reports

SN - 0370-1573

ER -