Zobrazeno 1 - 10
of 7 733
pro vyhledávání: '"A. A. Alexandrova"'
Autor:
A. A. Alexandrova, S. N. Koledin
Publikováno v:
Advanced Engineering Research, Vol 24, Iss 1, Pp 109-118 (2024)
Introduction. Multicriteria optimization, taking into account contradicting criteria, is used to improve production efficiency, reduce costs, improve product quality and environmental safety of processes. The literature describes the application of m
Externí odkaz:
https://doaj.org/article/cbc1526755704338af251fd49a463862
Autor:
Morgan, H. W. T., Tan, H. B. Tran, Elwell, R., Alexandrova, A. N., Hudson, Eric R., Derevianko, Andrei
Laser excitation of thorium-229 nuclei in doped wide bandgap crystals has been demonstrated recently, opening the possibility of developing ultrastable solid-state clocks and sensitive searches for new physics. We develop a quantitative theory of the
Externí odkaz:
http://arxiv.org/abs/2411.15641
Autor:
Lao, Guanming, Khvorost, Taras, Macias, Jr., Antonio, Morgan, Harry W. T., Lavroff, Robert H., Choi, Ryan, Zhou, Haowen, Usvyat, Denis, Zhu, Guo-Zhu, García-Garibay, Miguel A., Alexandrova, Anastassia N., Hudson, Eric R., Campbell, Wesley C.
Gas-phase molecules capable of repeatable, narrow-band spontaneous photon scattering are prized for direct laser cooling and quantum state detection. Recently, large molecules incorporating phenyl rings have been shown to exhibit similar vibrational
Externí odkaz:
http://arxiv.org/abs/2411.03199
Autor:
Morgan, H. W. T., Elwell, R., Terhune, J. E. S., Tan, H. B. Tran, Perera, U. C., Derevianko, A., Alexandrova, A. N., Hudson, E. R.
The recent laser excitation of the 229Th isomeric transition in a solid-state host opens the door for a portable solid-state nuclear optical clock. However, at present the vacuum-ultraviolet laser systems required for clock operation are not conduciv
Externí odkaz:
http://arxiv.org/abs/2410.23364
Autor:
Zhang, Chuankun, von der Wense, Lars, Doyle, Jack F., Higgins, Jacob S., Ooi, Tian, Friebel, Hans U., Ye, Jun, Elwell, R., Terhune, J. E. S., Morgan, H. W. T., Alexandrova, A. N., Tan, H. B. Tran, Derevianko, Andrei, Hudson, Eric R.
After nearly fifty years of searching, the vacuum ultraviolet $^{229}$Th nuclear isomeric transition has recently been directly laser excited [1,2] and measured with high spectroscopic precision [3]. Nuclear clocks based on this transition are expect
Externí odkaz:
http://arxiv.org/abs/2410.01753
Autor:
Pineda, S. V., Chhetri, P., Bara, S., Elskens, Y., Casci, S., Alexandrova, A. N., Au, M., Athanasakis-Kaklamanakis, M., Bartokos, M., Beeks, K., Bernerd, C., Claessens, A., Chrysalidis, K., Cocolios, T. E., Correia, J. G., De Witte, H., Elwell, R., Ferrer, R., Heinke, R., Hudson, E. R., Ivandikov, F., Kudryavtsev, Yu., Köster, U., Kraemer, S., Laatiaoui, M., Lica, R., Merckling, C., Morawetz, I., Morgan, H. W. T., Moritz, D., Pereira, L. M. C., Raeder, S., Rothe, S., Schaden, F., Scharl, K., Schumm, T., Stegemann, S., Terhune, J., Thirolf, P. G., Tunhuma, S. M., Bergh, P. Van Den, Van Duppen, P., Vantomme, A., Wahl, U., Yue, Z.
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the $^{229m}$Th nuclear clock isomer embedded in different host materials is reported. The ratio of the number of radiative decay photons and the n
Externí odkaz:
http://arxiv.org/abs/2408.12309
Autor:
Lavroff, Robert H., Kats, Daniel, Maschio, Lorenzo, Bogdanov, Nikolay A., Alavi, Ali, Alexandrova, Anastassia N., Usvyat, Denis
To date, computational methods for modeling defects (vacancies, adsorbates, etc.) rely on periodic supercells in which the defect is far enough from its repeated image such that they can be assumed non-interacting. Yet, the relative proximity and per
Externí odkaz:
http://arxiv.org/abs/2406.03373
Autor:
Green, J, Emmanouilidou, Eve, Morgan, Harry W. T., Laderer, William T., Hu, Chaowei, Loera, Jonathan, Alexandrova, Anastassia N., Ni, Ni
Compared to time-reversal symmetry-protected Z2 topological insulators and Dirac/Weyl semimetals, there are significantly fewer candidates for topological crystalline insulators. SrAg4Sb2 is predicted to exhibit topological crystalline insulator beha
Externí odkaz:
http://arxiv.org/abs/2404.14561
Autor:
Elwell, R., Schneider, Christian, Jeet, Justin, Terhune, J. E. S., Morgan, H. W. T., Alexandrova, A. N., Tan, H. B. Tran, Derevianko, Andrei, Hudson, Eric R.
LiSrAlF$_6$ crystals doped with $^{229}$Th are used in a laser-based search for the nuclear isomeric transition. Two spectroscopic features near the nuclear transition energy are observed. The first is a broad excitation feature that produces red-shi
Externí odkaz:
http://arxiv.org/abs/2404.12311
Publikováno v:
A&A 686, A114 (2024)
Configurations where two spacecraft, such as Parker Solar Probe (PSP) and Solar Orbiter (SolO), are radially aligned provide opportunities to study the evolution of a single solar wind parcel during so called plasma line-ups. The most critical part o
Externí odkaz:
http://arxiv.org/abs/2402.12382