Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Koller, Winfried"'
Autor:
Floc'h, Fabien Le, Koller, Winfried
In the Black-Scholes model, the absence of arbitrages imposes necessary constraints on the slope of the implied variance in terms of log-moneyness, asymptotically for large log-moneyness. The constraints are used for example in the SVI implied volati
Externí odkaz:
http://arxiv.org/abs/2304.13610
We give a comprehensive analysis of the singular dynamics and of the low-energy fixed point of one-channel impurity s-d models with ferromagnetic and underscreened antiferromagnetic couplings. We use the numerical renormalization group (NRG) to perfo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410127
Publikováno v:
Phys. Rev. B 67 174418 (2003)
The ferromagnetic Kondo model with classical corespins is studied via unbiased Monte-Carlo simulations. We show that with realistic parameters for the manganites and at low temperatures, the double-exchange mechanism does not lead to phase separation
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301350
Publikováno v:
Phys. Rev. B 67 104432 (2003)
We study the ferromagnetic Kondo model with classical corespins via unbiased Monte-Carlo simulations and derive a simplified model for the treatment of the corespins at any temperature. Our simplified model captures the main aspects of the Kondo mode
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211672
Publikováno v:
Phys. Rev. B 66, 144425 (2002)
Starting from the two-orbital Kondo-lattice model with classical t_2g spins, an effective spinless fermion model is derived for strong Hund coupling J_H with a projection technique. The model is studied by Monte Carlo simulations and analytically usi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0206049
Autor:
Albrecht, Silvia, Andrea Amerschläger, RAin, Barthofer, Jürgen, Bauer, Martin J.M., Bergmann, Artur, Berrsché, Gregor, Biedert, Roland, Bohnsack, Michael, Boschert, Hans-Peter, Braun, Angelika, Braun, Peter, Brinkmeier, Paul, Broy, Volker M.H., Brucker, Peter U., Brüggemann, Gerd-Peter, Brunnader, Lars, Conze, Michael P., Dann, Klaus, Dargel, Jens, Dau, Moritz, Deitmer, Gregor, Dienst, Michael, Disch, Alexander C., Doerr, Dominik, Eisele, Roland, Eisenlauer, Hans-Georg, Engelhardt, Martin, Englert, Andreas, Enneper, Jens, Fleischmann, Frank, Förster, Lukas, Freiwald, Jürgen, Fritzsche, Anna-Maria, Gfrörer, Wilfried, Gorschewsky, Ottmar, Gösele-Koppenburg, Andreas, Graff, Karlheinz, Greitemann, Bernhard, Grim, Casper, Haaker, Rolf, Hackl, Georg, Hallmaier, Berthold, Hämel, Dietolf, Hänsel, Lutz, Heck, Kornelius, Hiller, Bernd, Hintermann, Beat, Hirschmüller, Anja, Hirtler, Lena, Hörterer, Hubert, Holtschmit, Jan Holger, Hotfiel, Thilo, Humenberger, Michael, Jägemann, Volker, Jäger, Axel, Jerosch, Jörg, Jöllenbeck, Thomas, Kainberger, Franz, Kass, Antonius, Kauther, Max Daniel, Kerkhoffs, Gino M.M.J., Klein, Marlene, Knupp, Markus, Kohn, Dieter, Koller, Winfried, Krifter, Rolf Michael, Kristen, Karl-Heinz, Krüger, Sabine, Krüger-Franke, Michael, Kugler, Andreas, Leschinger, PD Dr. med. Tim, Leumann, André, Löffler, Ludwig, Lukas, Bernhard, Lutter, Christoph, Majewski, Martin, Mandryka, Boris, Mauch, Marlene, Mavridis, Georg, Mayer, Alexander, Miltner, Oliver, Möllers, Norbert, Müller-Wohlfahrt, Hans-Wilhelm, Nehrer, Stefan, Neumann, Georg, Neunteufel, Elena, Nolte, Stefan, Nührenbörger, Christian, Oberthaler, Gerhard, Orth, Patrick, Pagenstert, Geert, Parzeller, Markus, Pieper, Hans-Gerd, Raschka, Christoph, Reuter, Iris, Richter, Kirstin, Ritsch, Dr. Mathias, Rodt, Lisette, Rodt, Thomas, †<%2Fce%3Asup>%2C+Bernd%22">Rosemeyer