Zobrazeno 1 - 10
of 339
pro vyhledávání: '"Zaytsev, V."'
Self-energy and vacuum polarization effects in quantum electrodynamics (QED) are calculated for the supercritical Coulomb field, where Dirac energy levels become embedded in the negative-energy continuum. In this regime, the quantum vacuum becomes un
Externí odkaz:
http://arxiv.org/abs/2409.08121
Ab initio method based on a complex-scaling approach and aimed at a rigorous QED description of autoionizing states is worked out. The autoionizing-state binding energies are treated nonperturbatively in $\alpha Z$ and include all the many-electron Q
Externí odkaz:
http://arxiv.org/abs/2210.00773
Autor:
Malyshev, A. V., Glazov, D. A., Shabaev, V. M., Tupitsyn, I. I., Yerokhin, V. A., Zaytsev, V. A.
Publikováno v:
Phys. Rev. A 106, 012806 (2022)
The model-QED-operator approach [Phys. Rev. A 88, 012513 (2013)] to calculations of the radiative corrections to binding and transition energies in atomic systems is extended to the range of nuclear charges $110 \leqslant Z \leqslant 170$. The self-e
Externí odkaz:
http://arxiv.org/abs/2209.00463
We investigate the possibility to calculate the ground-state energy of the atomic systems on a quantum computer. For this purpose we evaluate the lowest binding energy of the moscovium atom with the use of the iterative phase estimation and variation
Externí odkaz:
http://arxiv.org/abs/2207.08255
The behavior of a twisted electron colliding with a linearly polarized laser pulse is investigated within relativistic quantum mechanics. In order to better fit the real experimental conditions, we introduce a Gaussian spatial profile for the initial
Externí odkaz:
http://arxiv.org/abs/2206.00110
The two-photon annihilation of a positron with an electron bound in the 1s state of a H-like ion is calculated within the fully relativistic QED framework. The interaction with the nucleus is treated nonperturbatively, thus allowing the calculations
Externí odkaz:
http://arxiv.org/abs/2203.06754
Autor:
Sommerfeldt, J., Yerokhin, V. A., Müller, R. A., Zaytsev, V. A., Volotka, A. V., Surzhykov, A.
We present a theoretical method to calculate Delbr\"uck scattering amplitudes. Our formalism is based on the exact analytical Dirac-Coulomb Green's function and, therefore, accounts for the interaction of the virtual electron-positron pair with the n
Externí odkaz:
http://arxiv.org/abs/2201.01657
Autor:
Groshev, M. E., Zaytsev, V. A., Yerokhin, V. A., Hillenbrand, P. -M., Litvinov, Yu. A., Shabaev, V. M.
A fully relativistic approach is presented for the calculation of the bremsstrahlung emitted by an electron scattered off an ionic target. The ionic target is described as a combination of an effective Coulomb potential and a finite-range potential i
Externí odkaz:
http://arxiv.org/abs/2112.03021
Autor:
Popov, R. V., Shabaev, V. M., Telnov, D. A., Tupitsyn, I. I., Maltsev, I. A., Kozhedub, Y. S., Bondarev, A. I., Kozin, N. V., Ma, X., Plunien, G., Stöhlker, T., Tumakov, D. A., Zaytsev, V. A.
Publikováno v:
Phys. Rev. D 102, 076005 (2020)
In slow collisions of two bare nuclei with the total charge number larger than the critical value, $Z_{\rm cr} \approx 173$, the initially neutral vacuum can spontaneously decay into the charged vacuum and two positrons. Detection of the spontaneous
Externí odkaz:
http://arxiv.org/abs/2008.05005
Publikováno v:
Phys. Rev. A 102, 063115 (2020)
We study the resonant sequential two-photon ionization of neutral atoms by a combination of twisted- and plane-wave light within a fully relativistic framework. In particular, the ionization of an isotropic ensemble of neutral sodium atoms ($Z = 11$)
Externí odkaz:
http://arxiv.org/abs/2007.13438