Zobrazeno 1 - 10
of 2 216
pro vyhledávání: '"A Tupitsyn"'
Autor:
Cheung, Charles, Kozlov, Mikhail G., Porsev, Sergey G., Safronova, Marianna S., Tupitsyn, Ilya I., Bondarev, Andrey I.
We introduce the pCI software package for high-precision atomic structure calculations. The standard method of calculation is based on the configuration interaction (CI) method to describe valence correlations, but can be extended to attain better ac
Externí odkaz:
http://arxiv.org/abs/2410.06680
Autor:
Rossi, R., Simkovic IV, F., Ferrero, M., Georges, A., Tsvelik, A. M., Prokof'ev, N. V., Tupitsyn, I. S.
The spin-fermion (SF) model postulates that the dominant coupling between low-energy fermions in near critical metals is mediated by collective spin fluctuations (paramagnons) peaked at the N\'{e}el wave vector, ${\bf Q}_N$, connecting hot spots on o
Externí odkaz:
http://arxiv.org/abs/2402.13238
Autor:
Tupitsyn, I. I., Savelyev, I. M., Kozhedub, Y. S., Telnov, D. A., Dulaev, N. K., Malyshev, A. V., Prokhorchuk, E. A., Shabaev, V. M.
The problem of orbital collapse of the $5g$ and $6f$ electrons in atoms of superheavy elements (SHE) is considered. Previously, the presence of the orbital collapse was established for the $4f$ and $5f$ elements of the periodic table. Because of the
Externí odkaz:
http://arxiv.org/abs/2402.02609
Autor:
Telnov, D. A., Dulaev, N. K., Kozhedub, Y. S., Maltsev, I. A., Popov, R. V., Tupitsyn, I. I., Shabaev, V. M.
We present a theoretical and computational study of positron supercritical resonances in systems consisting of two highly-charged bare nuclei. The resonance positions and widths depending on the internuclear separation are calculated with the help of
Externí odkaz:
http://arxiv.org/abs/2401.14735
Autor:
Usov, D. P., Kozhedub, Y. S., Meshkov, V. V., Stolyarov, A. V., Dulaev, N. K., Mosyagin, N. S., Ryzhkov, A. M., Savelyev, I. M., Shabaev, V. M., Tupitsyn, I. I.
The ground X1{\Sigma}+ state potential energy curve (PEC) and dipole moment curve (DMC) of CO molecule have been revisited within the framework of the relativistic coupled-cluster approach, which incorporates non-perturbative single, double, and trip
Externí odkaz:
http://arxiv.org/abs/2312.14168
Autor:
Dulaev, N. K., Telnov, D. A., Shabaev, V. M., Kozhedub, Y. S., Maltsev, I. A., Popov, R. V., Tupitsyn, I. I.
Positron creation probabilities as well as energy and angular distributions of outgoing positrons in slow collisions of two identical heavy nuclei are obtained within the two-center approach beyond the monopole approximation. The time-dependent Dirac
Externí odkaz:
http://arxiv.org/abs/2312.05069
Autor:
Tupitsyn, I. S., Prokof'ev, N. V.
Material science methods aim at developing efficient computational schemes for describing complex many-body effects and how they are revealed in experimentally measurable properties. Bethe-Salpeter equation in the self-consistent Hartree-Fock basis i
Externí odkaz:
http://arxiv.org/abs/2311.05611
Autor:
Tupitsyn, I. S., Prokof'ev, N. V.
Publikováno v:
Phys. Rev. B 109, 045152 (2024)
Self-consistent Hartree-Fock approximation combined with solutions of the Bethe-Salpeter equation offers a powerful tool for studies of strong correlation effects arising in condensed matter models, nuclear physics, quantum field theories, and real m
Externí odkaz:
http://arxiv.org/abs/2309.16124
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:
JETP Letters 118, 87-91 (2023)
The binding-energy differences for $^{163}\mathrm{Ho}^{q+}$ and $^{163}\mathrm{Dy}^{q+}$ ions with ionization degrees $q = 38$, $39$, and $40$ are calculated. The calculations are performed using the large-scale relativistic configuration-interaction
Externí odkaz:
http://arxiv.org/abs/2306.03176