Zobrazeno 1 - 10
of 273
pro vyhledávání: '"Volotka, A. V."'
The finite basis set method is commonly used to calculate atomic spectra, including QED contributions such as bound-electron self-energy. Still, it remains problematic and underexplored for vacuum-polarization calculations. We fill this gap by trying
Externí odkaz:
http://arxiv.org/abs/2406.06758
Autor:
Baturin, S. S., Volotka, A. V.
Publikováno v:
Physical Review A 110(2):L020801 (2024)
We develop a simple model and propose a scheme that allows the production of twisted atoms in free space using the absorption of twisted photons by a bound electron. We show that in the inelastic collision of a photon and an atom, the twisted state o
Externí odkaz:
http://arxiv.org/abs/2404.11558
Publikováno v:
Physical Review A 109(5):52805 (2024)
We investigate the twisted state of an atom and the possible effect of such a state on the properties of the photons emitted as a result of an electron transition in that atom. We first propose a framework for describing the twisted atomic state, and
Externí odkaz:
http://arxiv.org/abs/2312.09182
Autor:
Kozlov, M. G., Oleynichenko, A. V., Budker, D., Glazov, D. A., Lomachuk, Y. V., Shabaev, V. M., Titov, A. V., Tupitsyn, I. I., Volotka, A. V.
The $^{229}$Th nucleus has a long-lived isomeric state $A^*$ at 8.338(24) eV [Kraemer et al, Nature, \textbf{617}, 706 (2023)]. This state is connected to the ground state by an M1 transition. For a hydrogenlike Th ion in the $1s$ state the hyperfine
Externí odkaz:
http://arxiv.org/abs/2308.05173
Publikováno v:
Phys. Rev. A 107, 032815 (2023)
We present the systematic QED treatment of the electron correlation effects on the $g$ factor of lithiumlike ions for the wide range of nuclear charge number $Z= 14$ -- $82$. The one- and two-photon exchange corrections are evaluated rigorously withi
Externí odkaz:
http://arxiv.org/abs/2305.04245
Autor:
Soguel, R. N., Volotka, A. V., Tryapitsyna, E. V., Glazov, D. A., Kosheleva, V. P., Fritzsche, S.
Publikováno v:
Phys. Rev. A 103, 042818 (2021)
The two-photon-exchange diagrams for atoms with single valence electrons are investigated. Calculation formulas are derived for an arbitrary state within the rigorous bound-state QED framework utilizing the redefined vacuum formalism. In contrast to
Externí odkaz:
http://arxiv.org/abs/2206.06683
Publikováno v:
Phys. Rev. A 106, 012802 (2022)
An ab initio QED approach to treat a valence-hole excitation in closed shell systems is developed in the framework of the two-time-Green function method. The derivation considers a redefinition of the vacuum state and its excitation as a valence-hole
Externí odkaz:
http://arxiv.org/abs/2206.06233
Autor:
Wang, S. X., Huang, Z. K., Wen, W. Q., Ma, W. L., Wang, H. B., Schippers, S., Wu, Z. W., Kozhedub, Y. S., Kaygorodov, M. Y., Volotka, A. V., Wang, K., Zhang, C. Y., Chen, C. Y., Liu, C., Huang, H. K., Shao, L., Mao, L. J., Ma, X. M., Li, J., Tang, M. T., Yan, K. M., Zhou, Y. B., Yuan, Y. J., Yang, J. C., Zhang, S. F., Ma, X., Zhu, L. F.
High precision spectroscopy of the low-lying dielectronic resonances in fluorine-like nickel ions were determined by employing the merged electron-ion beam at the heavy-ion storage ring CSRm. The measured dielectronic resonances are identified by com
Externí odkaz:
http://arxiv.org/abs/2205.01334
Autor:
Sailer, Tim, Debierre, Vincent, Harman, Zoltán, Heiße, Fabian, König, Charlotte, Morgner, Jonathan, Tu, Bingsheng, Volotka, Andrey V., Keitel, Christoph H., Blaum, Klaus, Sturm, Sven
The quantum electrodynamic (QED) description of light-and-matter interaction is one of the most fundamental theories of physics and has been shown to be in excellent agreement with experimental results. Specifically, measurements of the electronic ma
Externí odkaz:
http://arxiv.org/abs/2204.12182
Publikováno v:
Phys. Rev. A 106,013118 2022
The total ionization rate of biharmonic ($\omega + 3\omega$) ionization is studied within the independent particle approximation and the third order perturbation theory. Particular attention is paid to how the polarization of the biharmonic light fie
Externí odkaz:
http://arxiv.org/abs/2204.09406