Zobrazeno 1 - 10
of 2 484
pro vyhledávání: '"Vasiliev S"'
Structured light, in particular light possessing orbital angular momentum (OAM), has been actively studied in recent decades. Helical Bragg grating (HBG) is a reflecting optical element, which predicted to be able to convert the OAM of light in waveg
Externí odkaz:
http://arxiv.org/abs/2109.03578
Autor:
Ahokas, J., Semakin, A., Järvinen, J., Hanski, O., Laptiyenko, A., Dvornichenko, V., Salonen, K., Burkley, Z., Crivelli, P., Golovizin, A., Nesvizhevsky, V., Nez, F., Yzombard, P., Widmann, E., Vasiliev, S.
We describe the design and performance of a large magnetic trap for storing and cooling of atomic hydrogen (H). The trap operates in the vacuum space of a dilution refrigerator at a temperature of 1.5 K. Aiming at a large volume of the trap we implem
Externí odkaz:
http://arxiv.org/abs/2108.09123
Autor:
Nesvizhevsky, V. V., Nez, F., Vasiliev, S. A., Widmann, E., Crivelli, P., Reynaud, S., Voronin, A. Yu.
Publikováno v:
Eur. Phys. J. C (2020) 80:520
Observation time is the key parameter for improving the precision of measurements of gravitational quantum states of particles levitating above a reflecting surface. We propose a new method of long confinement in such states of atoms, anti-atoms, neu
Externí odkaz:
http://arxiv.org/abs/2001.06332
Autor:
Jarvinen, J., Zvezdov, D., Ahokas, J., Sheludyakov, S., Lehtonen, L., Vasiliev, S., Vlasenko, L., Ishikawa, Y., Fujii, Y.
We present an experimental study of the Dynamic Nuclear Polarization (DNP) of \si{} nuclei in silicon crystals of natural abundance doped with As in the temperature range 0.1-1 K and in strong magnetic field of 4.6 T. This ensures very high degree of
Externí odkaz:
http://arxiv.org/abs/1911.11654
Akademický článek
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Autor:
Lehtonen, L., Vainio, O., Ahokas, J., Järvinen, J., Sheludyakov, S., Suominen, K. -A., Vasiliev, S., Khmelenko, V., Lee, D. M.
Publikováno v:
Phys. Scr. 93 094002 (2018)
Our recent experimental work on electron spin waves in atomic hydrogen gas has prompted a revisit of the theory of the Identical Spin Rotation Effect (ISRE). A key characteristic determining the properties of the spin waves is the quality factor of I
Externí odkaz:
http://arxiv.org/abs/1804.10431
Autor:
Crépin, P. -P., Kupriyanova, E. A., Guérout, R., Lambrecht, A., Nesvizhevsky, V. V., Reynaud, S., Vasiliev, S., Voronin, A. Yu.
Publikováno v:
EPL, 119 (2017) 33001
We study the quantum reflection of ultracold antihydrogen atoms bouncing on the surface of a liquid helium film. The Casimir-Polder potential and quantum reflection are calculated for different thicknesses of the film supported by different substrate
Externí odkaz:
http://arxiv.org/abs/1709.07724
Publikováno v:
Journal of Mathematical Analysis and Applications 472 (2019) no.1, 1028-1041
We consider second order linear differential operators possessing a term depending on the unknown function with a fixed argument and study the uniqueness of recovering the operators from the spectrum. We also obtain a constructive procedure for solvi
Externí odkaz:
http://arxiv.org/abs/1707.00828
Autor:
Järvinen, J., Ahokas, J., Sheludyakov, S., Vainio, O., Lehtonen, L., Vasiliev, S., Zvezdov, D., Vlasenko, L.
We present the results of experiments on dynamic nuclear polarization and relaxation of 75As in silicon crystals. Experiments are performed in strong magnetic fields of 4.6 T and temperatures below 1 K. At these conditions donor electron spins are fu
Externí odkaz:
http://arxiv.org/abs/1611.04384
Autor:
Sheludiakov, S., Ahokas, J., Järvinen, J., Vainio, O., Lehtonen, L., Vasiliev, S., Lee, D. M., Khmelenko, V. V.
We report on a study of Dynamic Nuclear Polarization and electron and nuclear spin relaxation of atomic hydrogen and deuterium in solid molecular matrices of H$_{2}$, D$_{2}$, and HD mixtures. The electron and nuclear spin relaxation times ($T_{1e}$
Externí odkaz:
http://arxiv.org/abs/1609.09772