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of 896
pro vyhledávání: '"A, Rubensson"'
Density matrix perturbation theory based on recursive Fermi-operator expansions provides a computationally efficient framework for time-independent response calculations in quantum chemistry and materials science. From a perturbation in the Hamiltoni
Externí odkaz:
http://arxiv.org/abs/2409.17033
Autor:
Jin, Rui, Fouda, Adam, Magunia, Alexander, Nam, Yeonsig, Rebholz, Marc, De Fanis, Alberto, Li, Kai, Doumy, Gilles, Baumann, Thomas M., Straub, Michael, Usenko, Sergey, Ovcharenko, Yevheniy, Mazza, Tommaso, Montaño, Jacobo, Agåker, Marcus, Piancastelli, Maria Novella, Simon, Marc, Rubensson, Jan-Erik, Meyer, Michael, Young, Linda, Ott, Christian, Pfeifer, Thomas
The nonlinear interaction of x-rays with matter is at the heart of understanding and controlling ultrafast molecular dynamics from an atom-specific viewpoint, providing new scientific and analytical opportunities to explore the structure and dynamics
Externí odkaz:
http://arxiv.org/abs/2407.04303
A key concern of automatic process discovery is to provide insights into performance aspects of business processes. Waiting times are of particular importance in this context. For that reason, it is surprising that current techniques for automatic pr
Externí odkaz:
http://arxiv.org/abs/2401.04114
Autor:
Rubensson, Emanuel H.
We present theory for general partial derivatives of matrix functions on the form $f(A(x))$ where $A(x)$ is a matrix path of several variables ($x=(x_1,\dots,x_j)$). Building on results by Mathias [SIAM J. Matrix Anal. Appl., 17 (1996), pp. 610-620]
Externí odkaz:
http://arxiv.org/abs/2306.15814
Autor:
Marcus Agåker, Johan Söderström, Thomas M. Baumann, Carl-Johan Englund, Ludvig Kjellsson, Rebecca Boll, Alberto De Fanis, Simon Dold, Tommaso Mazza, Jacobo Montaño, Astrid Münnich, Terence Mullins, Yevheniy Ovcharenko, Nils Rennhack, Philipp Schmidt, Björn Senfftleben, Monica Turcato, Sergey Usenko, Michael Meyer, Joseph Nordgren, Jan-Erik Rubensson
Publikováno v:
Journal of Synchrotron Radiation, Vol 31, Iss 5, Pp 1264-1275 (2024)
A 1D imaging soft X-ray spectrometer installed on the small quantum systems (SQS) scientific instrument of the European XFEL is described. It uses movable cylindrical constant-line-spacing gratings in the Rowland configuration for energy dispersion i
Externí odkaz:
https://doaj.org/article/0e4937182b9f4be5bfc79881f4ed2ef6
Autor:
Cornetta, Lucas M., Carravetta, Vincenzo, Tokushima, Takashi, Horikawa, Yuka, Rubensson, Jan-Erik, Nordgren, Joseph, Ågren, Hans
Publikováno v:
In Chemical Physics Letters 16 November 2024 855
Autor:
Finkelstein, Joshua, Rubensson, Emanuel H., Mniszewski, Susan M., Negre, Christian F. A., Niklasson, Anders M. N.
Time-independent quantum response calculations are performed using Tensor cores. This is achieved by mapping density matrix perturbation theory onto the computational structure of a deep neural network. The main computational cost of each deep layer
Externí odkaz:
http://arxiv.org/abs/2203.09621
Autor:
Mukkattukavil, Deepak John, Hellsvik, Johan, Ghosh, Anirudha, Chatzigeorgiou, Evanthia, Nocerino, Elisabetta, Wang, Qisi, von Arx, Karin, Huang, Shih-Wen, Ekholm, Victor, Hossain, Zakir, Thamizhavel, Arumugum, Chang, Johan, Mansson, Martin, Nordstrom, Lars, Sathe, Conny, Agaker, Marcus, Rubensson, Jan-Erik, Sassa, Yasmine
X-ray absorption (XAS) and Resonant Inelastic X-ray Scattering (RIXS) spectra of LaPt$_2$Si$_2$ single crystal at the Si L and La N edges are presented. The data are interpreted in terms of density functional theory, showing that the Si spectra can b
Externí odkaz:
http://arxiv.org/abs/2202.11587
Autor:
Ghosh, Anirudha, Jonsson, H. Johan M., Mukkattukavil, D. J., Kvashnin, Y., Phuyal, D., Agaker, M., Nicolaou, Alessandro, Jonak, M., Klingeler, R., Kamalakar, M. V., Rensmo, Hakan, Sarkar, Tapati, Vasiliev, Alexander N., Butorin, Sergei, Rubensson, J. -E., Eriksson, Olle, Abdel-Hafiez, Mahmoud
We report on a combined experimental and theoretical study on CrI3 single crystals by employing the polarization dependence of resonant inelastic X-ray scattering (RIXS). Our investigations reveal multiple Cr 3d orbital splitting (dd excitations) as
Externí odkaz:
http://arxiv.org/abs/2201.04400
Autor:
Finkelstein, Joshua, Smith, Justin S., Mniszewski, Susan M., Barros, Kipton, Negre, Christian F. A., Rubensson, Emanuel H., Niklasson, Anders M. N.
Tensor cores, along with tensor processing units, represent a new form of hardware acceleration specifically designed for deep neural network calculations in artificial intelligence applications. Tensor cores provide extraordinary computational speed
Externí odkaz:
http://arxiv.org/abs/2107.02737