Zobrazeno 1 - 10
of 197
pro vyhledávání: '"Vladimir Hizhnyakov"'
Autor:
Andreas Bill, Vladimir Hizhnyakov, Reinhard K. Kremer, Götz Seibold, Aleksander Shelkan, Alexei Sherman
Publikováno v:
Condensed Matter, Vol 5, Iss 4, p 65 (2020)
The microscopic mechanism of charge instabilities and the formation of inhomogeneous states in systems with strong electron correlations is investigated. We demonstrate that within a strong coupling expansion the single-band Hubbard model shows an in
Externí odkaz:
https://doaj.org/article/95b4fbdb912545b3849d44328f9719b4
Autor:
Vladimir Hizhnyakov
Publikováno v:
Chemical Physics Letters. 808:140092
Publikováno v:
Physical Review B. 103
Based on the two-fluid model of helium II, a theory is proposed to explain the recently observed temperature dependence of the zero-phonon line (ZPL) in the optical spectra of Dy atoms in superfluid helium. According to this theory, the main reason f
Publikováno v:
Physics Letters A. 383:1893-1896
The mobility of high-frequency discrete breathers in monatomic chains with nonlinear interatomic potentials of the nearest neighbors is considered. It was found that the odd (cubic and fifth) anharmonicity strongly affects the mobility of breathers,
Publikováno v:
Optik. 171:557-564
The realization of efficient and miniature source of entangled photon pairs stills remains a challenge. In this work, we experimentally studied the possibility to enhance the process of spontaneous parametric down-conversion by surface plasmon polari
Publikováno v:
Web of Science
Fluoride crystals doped with rare-earth ions (REI) and pair centers in diamond for fast ($10^{-9}\rm{s}$) quantum computers (FQC) are proposed. As specific systems for REI doping, we propose $Ca_{1-x}Sr_{x}F_{2}$ crystals and their analogues. The $^{
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::454dcf6ec10761297a3ded9f2a12635a
Autor:
Aleksander Shelkan, Andreas Bill, Vladimir Hizhnyakov, Reinhard K. Kremer, Götz Seibold, Alexei Sherman
Publikováno v:
Condensed Matter
Volume 5
Issue 4
Condensed Matter, Vol 5, Iss 65, p 65 (2020)
Volume 5
Issue 4
Condensed Matter, Vol 5, Iss 65, p 65 (2020)
We investigate the microscopic mechanism of charge instabilities and the formation of inhomogeneous states in systems with strong electron correlations. It is demonstrated that within a strong coupling expansion the single-band Hubbard model shows an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f328ba696a302812d865d2ef0ac159e9
Autor:
E.A. Vagapova, Leonid Dolgov, E.E. Vinogradova, Vladimir Hizhnyakov, Aleksei Treshchalov, V. A. Konyushkin, Yu.V. Orlovskii, Viktor Peet, E.O. Orlovskaya
Publikováno v:
Journal of Luminescence. 234:117988
Earlier, it was shown by the EPR method that at a very low concentration of the Nd3+ ion in the Nd3+:CaF2 crystal, highly symmetric cubic centers with the Oh symmetry are formed. In the present study, the optical centers of the Nd3+ ion with an anoma
Publikováno v:
Optics Communications. 485:126693
The possibility of using mixed crystals highly doped with rare earth ions (REIs) as physical systems for creating fast quantum computers with a sampling time of nanoseconds is discussed. The electronic 4f states of rare earth ions with small values o
Autor:
Laurits Puust, Alexander P. Yelisseyev, Vladimir Hizhnyakov, Valter Kiisk, Ardi Loot, Igor I. Vlasov, A. Osvet, Ilmo Sildos
Publikováno v:
Diamond and Related Materials. 76:27-30
We carried out a laser spectroscopic investigation of high-pressure, high-temperature (HTHP) synthetic diamond containing NE8 defects. In the photoluminescence (PL) emission spectra the defects have a zero-phonon line (ZPL) at 794 nm. Under 730 nm ex