Publications (52)
Thermal corrections to the bound-electron -factor
T. Zalialiutdinov, D. Glazov, D. Solovyev
The influence of the blackbody radiation field on the -factor of light hydrogenlike ions is considered within the framework of quantum electrodynamics at finite temperature for…
BBR-induced Stark shifts and level broadening in helium atom
T. Zalialiutdinov, D. Solovyev, L. Labzowsky
The precise calculations of blackbody radiation (BBR)-induced Stark shifts and depopulation rates for low-lying states of helium atom with the use of variational approach are prese…
Influence of external electric fields on multi-photon transitions between the 2s, 2p and 1s levels for hydrogen and anti-hydrogen atoms and hydrogen-like ions
D. Solovyev, L. Labzowsky, G. Plunien +1
One- and two-photon transitions in the hydrogen atom are analytically evaluated in the absence and in the presence of an external electric field. The emission probabilities are dif…
Access via laboratory experiments to the level mixing effect induced by blackbody radiation and its influence on the cosmological hydrogen recombination problem
T. Zalialiutdinov, D. Solovyev, L. Labzowsky +1
An effect of atomic line broadening induced by the blackbody radiation is discussed. The level mixing effect and anti-Stokes Raman scattering are compared. It is shown that the mix…
Importance of nonresonant corrections for the description of atomic spectra
D. Solovyev, A. Anikin, T. Zalialiutdinov +1
We demonstrate that the present superaccurate measurements of transition processes between atomic states in hydrogen atom reached the limit of accuracy when transition frequency ca…
QED theory of the multiphoton cascade transitions in atoms
L. Labzowsky, D. Solovyev, T. Zalialiutdinov
QED theory of multiphoton cascade transitions in atoms and ions is developed. This theory allows for the accurate description of the process important for astrophysical studies of…
Vertex-type thermal correction to the one-photon transition rates
D. Solovyev, T. Zalialiutdinov, A. Anikin
Thermal corrections to the one-photon spontaneous and induced transition probabilities for hydrogen and hydrogen-like ions are evaluated. The found thermal corrections are given by…
Angular correlations in two-photon spectroscopy of hydrogen
A. Anikin, T. Zalialiutdinov, D. Solovyev
In the present paper, we consider nonresonant corrections to transition frequencies in hydrogen for the experiments based on two-photon spectroscopy. A detailed study…
Two-photon approximation in the theory of the electron recombination in hydrogen
D. Solovyev, L. Labzowsky
A rigorous QED theory of the multiphoton decay of excited states in hydrogen atom is presented. The "two-photon" approximation is formulated which is limited by the one-photon and…
Reassessment of line profile asymmetry in measurements of the 1s-2s energy interval in hydrogen
D. Solovyev, A. Anikin, T. Zalialiutdinov +1
Experiments to determine transition frequencies in the hydrogen atom represent some of the most precise spectroscopic measurements and are at a higher level among simple atomic sys…
Natural line profile asymmetry
A. Anikin, T. Zalialiutdinov, D. Solovyev
The paper discusses the line profile asymmetry of the photon scattering process that arises naturally in quantum electrodynamics (QED). Based on precision spectroscopic experiments…
The blackbody radiation vibrational level shifts in the ground electronic state of N
T. Zalialiutdinov, Y. Demidov, D. Solovyev
Homonuclear molecules have emerged as a crucial component in the pursuit of frequency standards, offering a promising avenue for the discovery of new physics phenomena that transce…
Effect of antiprotons on hydrogen-like ions in external magnetic fields
A. Anikin, A. Danilov, D. Glazov +2
In the present work, quasi-molecular compounds consisting of one antiproton () and one hydrogen-like ion are investigated: , $\mathrm{Li}^{2+} -…
Long-range magnetic interaction within quantum electrodynamics formalism
D. Solovyev, T. Zalialiutdinov, A. Anikin +6
Within the framework of quantum electrodynamics, the interaction between two atoms at large distances is analyzed. Using the S-matrix formalism, an expression for the magnetic inte…
Radiative corrections to the level width in the presence of magnetic field
D. Solovyev, T. Zalialiutdinov
We study the influence of constant magnetic field combined with a field induced by the external thermal environment on the atomic decay rates. The importance of radiative correctio…
Extension of the sum rule for the transition rates between multiplets to the multiphoton case
D. Solovyev, L. Labzowsky, A. Volotka +1
The sum rule for the transition rates between the components of two multiplets, known for the one-photon transitions, is extended to the multiphoton transitions in hydrogen and hyd…
Thermal radiative corrections to hyperfine structure of light hydrogen-like systems
T. Zalialiutdinov, D. Glazov, D. Solovyev
In this work, we consider the thermal correction to the hyperfine interaction in hydrogen, deuterium, and the He ion. This correction is effectively described by one-loop F…
Spin-Statistic Selection Rules for Multiphoton Transitions: Application to Helium Atom
T. Zalialiutdinov, D. Solovyev, L. Labzowsky +1
A theoretical investigation of the three-photon transition rates and for the helium atom is presented. P…
Theoretical prerequisites for the upcoming generation of precision spectroscopic experiments
D. Solovyev, T. Zalialiutdinov, A. Anikin +1
Modern resonant spectroscopic experiments to measure transition frequencies in atoms have reached a level where a meticulous description of all aspects of the processes under study…
Spin-Statistic Selection Rules for Multi-Equal-Photon Transitions in Atoms: Extension of the Landau-Yang Theorem to Multiphoton Systems
T. Zalialiutdinov, D. Solovyev, L. Labzowsky +1
We establish the existence of spin-statistic selection rules (SSSR) for multi-equal-photon transitions in atomic systems. These selection rules are similar to those for systems of…
On the problem of proton radius puzzle
D. Solovyev
This paper concerns the most intriguing question of modern atomic physics: determination of the proton root-mean-square (rms) charge radius (). This problem was announced by t…
Answer on the comment by S. G. Karshenboim, V. G. Ivanov and J. Chluba
L. Labzowsky, D. Solovyev
We studied carefully the comment by S. G. Karshenboim, V. G. Ivanov and J. Chluba to our paper "Two-photon approximation in the theory of the electron recombination in hydrogen" an…
Alternative interpretation of relativistic time-reversal and the time arrow
T. Zalialiutdinov, D. Solovyev, D. Chubukov +2
It is well-known that the 4-rotation in the 4-dimensional space-time is equivalent to the CPT-transformation (C is the charge conjugation, P is the space inversion and T is the tim…
EIT phenomenon for the three-level hydrogen atoms and its application to the era of the cosmological recombination
D. Solovyev, V. K. Dubrovich
The electromagnetically induced transparency (EIT) phenomenon in earlier universe is considered. We evaluated the elementary processes of the single scattering of photon on the hyd…
Thermal corrections of lowest order for a helium atom
D. Solovyev, T. Zalialiutdinov, A. Anikin
In this paper the new type of thermal corrections for the helium and helium-like atomic systems are introduced. These are thermal one-photon exchange between the bound electrons an…
Exploring the Properties of Light Diatomic Molecules in Strong Magnetic Fields
T. Zalialiutdinov, D. Solovyev
In this study, we develop and implement a specialized coupled-cluster (CC) approach tailored for accurately describing atoms and molecules in strong magnetic fields. Using the open…
Lowest order thermal correction to the hydrogen recombination cross section in presence of blackbody radiation
J. Triaskin, T. Zalialiutdinov, A. Anikin +1
In the present paper, the correction due to the thermal interaction of two charges to the recombination and ionization processes for the hydrogen atom is considered. The evaluation…
QED model of the radiation escape from the matter
T. Zalialiutdinov, D. Solovyev, L. Labzowsky
A simple model based on QED is presented for the estimation of contribution of the excited level few-photon decays to the radiation escape from the matter in the epoch of the cosmo…
Multipole decomposition of the thermal one-loop self-energy correction for a bound atomic electron
J. J. Lopez-Rodriguez, A. Bobylev, P. Kvasov +2
In this paper, we present a comprehensive analysis of the one-loop self-energy correction at finite temperature for the bound electron. In this approach, we study the influence of…
Recombination process for hydrogen atom in presence of blackbody radiation
D. Solovyev, T. Zalialiutdinov, A. Anikin +2
The process of recombination for the hydrogen atom in the heat bath creating the blackbody radiation is descibed within the frameworks of quantum electrodynamics. For this purpose…
Two-photon decay of excited levels in hydrogen: the ambiguity of the separation of cascades and pure two-photon emission
L. Labzowsky, D. Solovyev, G. Plunien
The problem of the evaluation of the two-photon decay width of excited states in hydrogen is considered. Two different approaches to the evaluation of the width including cascades…
Two-photon atomic level widths at finite temperatures
T. Zalialiutdinov, A. Anikin, D. Solovyev
The thermal two-photon level broadening of the excited energy levels in the hydrogen and H-like helium is evaluated via the imaginary part of thermal two-loop self-energy correctio…
Two-photon decays of highly excited states in hydrogen
D. Solovyev, V. Dubrovich, A. V. Volotka +2
The relativistic and nonrelativistic approaches for the calculations of the two-photon decay rates of highly excited states in hydrogen are compared. The dependence on the principa…
Thermal QED theory for bound states
D. Solovyev
In present paper the Quantum Electrodynamics theory at finite temperatures for the bound states is presented. To describe the thermal effects arising in a heat bath the Hadamard fo…
Theoretical study of the accuracy limits for the optical resonance frequency measurements
L. Labzowsky, G. Schedrin, D. Solovyev +1
The principal limits for the accuracy of the resonance frequency measurements set by the asymmetry of the natural resonance line shape are studied and applied to the recent accurat…
Analysis of nonresonant effects in the two-photon spectroscopy of helium
T. Zalialiutdinov, A. Anikin, D. Solovyev
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…
One- and two-photon resonant spectroscopy of hydrogen and anti-hydrogen atoms in external electric fields
L. Labzowsky, D. Solovyev, V. Sharipov +2
The resonant spectra of hydrogen and anti-hydrogen atoms in the presence of an external electric field are compared theoretically. It is shown that nonresonant corrections to the t…
Radiative QED corrections to one-photon transition rates in hydrogen atom at finite temperatures
T. Zalialiutdinov, D. Solovyev, L. Labzowsky
Within the framework of QED theory at finite temperature the thermal radiative corrections to spontaneous one-photon transition rates in hydrogen atom are investigated. The radiati…
Light one-electron quasi-molecular ions within the finite-basis-set method for the two-center Dirac equation
D. Solovyev, A. Anikin, A. Danilov +2
The electronic spectra of light one-electron quasi-molecular compounds H-H, He-He and He-H are analyzed. To this end, the two-center Dirac equation is solved b…
Line Profile Asymmetry in Precision Spectroscopy
A. Anikin, T. Zalialiutdinov, D. Solovyev +1
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…
Long-range interaction of hydrogen atoms at finite temperatures
T. Zalialiutdinov, D. Solovyev
In this study, we reexamine the long-range interaction between two atoms placed in an equilibrium thermal radiation environment. Employing the formalism of quantum electrodynamics…
Analysis of the Absorption Line Profile at 21 cm for the Hydrogen Atom in Interstellar Medium
D. Solovyev
The paper analyzes the absorption line profile at 21 cm for the hydrogen atom in the interstellar medium. The hydrogen atom is treated as a three-level system illuminated by a powe…
Relativistic corrections to the thermal interaction of bound particles
D. Solovyev, T. Zalialiutdinov, A. Anikin
This paper discusses relativistic corrections to the thermal Coulomb potential for simple atomic systems. The theoretical description of the revealed thermal corrections is carried…
Non-adiabatic Effects Induced by Strong Light-Matter Coupling in Cavity QED
T. Zalialiutdinov, D. Solovyev, J. J. Lopez-Rodriguez +2
We present a systematic study of the diagonal Born-Oppenheimer correction (DBOC) for atoms and molecules embedded in optical cavities and interacting with a quantized electromagnet…
Handling the asymmetric spectral line profile
D. Solovyev, A. Anikin, T. Zalialiutdinov
This paper discusses some features of the spectral line profile theory used in the treatment of measured atomic transitions. It is shown that going beyond the established linear ap…
Thermal corrections for positronium
D. Solovyev, T. Zalialiutdinov, A. Anikin
Thermal corrections, including relativistic effects, for the positronium atom are discussed. The theoretical description of thermal corrections is carried out within the framework…
Investigation of the electromagnetically induced transparency in era of cosmological hydrogen recombination
D. Solovyev, V. K. Dubrovich, G. Plunien
Investigation of the cosmic microwave background formation processes is one of the most actual problem at present time. In this paper we analyze the response of the hydrogen atom t…
Thermal contribution to measured -factors in alkali-like atoms
T. Zalialiutdinov, Y. Kozhedub, D. Solovyev
In this paper, we consider a one-loop thermal correction to the -factors of the ground and low-lying excited states in neutral alkaline-like atomic systems. As an example, we ca…
Proton size from precision experiments on hydrogen and muonic hydrogen atoms
D. Solovyev, T. Zalialiutdinov, A. Anikin
The "proton radius puzzle" was recently solved by reducing the four-standard deviation discrepancy between the results for electronic hydrogen () and muonic hydrogen () ato…
QED calculations of three-photon transition probabilities in H-like ions with arbitrary nuclear charge
T. Zalialiutdinov, D. Solovyev, L. Labzowsky
The quantum electrodynamical theory of the three-photon transitions in hydrogen-like ions is presented. Emission probabilities of various three-photon decay channels for $ 2p_{3/2}…
Theory of the multiphoton cascade transitions with two photon links: comparison of Quantum Electrodynamical and Quantum Mechanical approaches
T. Zalialiutdinov, Yu. Baukina, D. Solovyev +1
QED theory of multiphoton cascade transitions in atoms and ions is developed. In particular the , and processes…
Combined two-loop self-energy corrections at finite and zero temperatures
T. Zalialiutdinov, D. Solovyev
In this paper we investigate higher-order corrections to the energies of bound states in hydrogen subjected to the external blackbody radiation field. In particular, within the fra…