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pro vyhledávání: '"Heiss, WD"'
Autor:
Heiss, WD
A simple model is suggested by assuming an effective interaction at the crossing point of the two curves, the Schwarzschild radius and the Compton wave length, that is at the Planck length and Planck mass. It is argued that there would be a physical
Externí odkaz:
http://arxiv.org/abs/1810.04399
A simple matrix model that has been used to describe essential features of a PT symmetric set-up of three coupled wave guides is investigated. The emphasis of the study lies on the occurrence of an exceptional point of third order. It is demonstrated
Externí odkaz:
http://arxiv.org/abs/1703.09455
Autor:
Heiss, WD
Spectral singularities such as exceptional points invoke specific physical effects. The present paper focuses upon the time dependent solutions of the Schr\"odinger equation. In a simple model it is demonstrated that - depending on initial conditions
Externí odkaz:
http://arxiv.org/abs/1009.5780
We propose a general approach to characterise fluctuations of measured cross sections of nuclear giant resonances. Simulated cross sections are obtained from a particular, yet representative self-energy which contains all information about fragmentat
Externí odkaz:
http://arxiv.org/abs/0912.3594
Autor:
Heiss, WD
The thermodynamic limit of the Lipkin model is investigated. While the limit turns out to be rather elusive, the analysis gives strong indications that the limit yields two analytically dissociated operators, one for the normal and one for the deform
Externí odkaz:
http://arxiv.org/abs/quant-ph/0603241
Autor:
Leyvraz, F, Heiss, WD
We introduce a novel semiclassical approach to the Lipkin model. In this way the well-known phase transition arising at the critical value of the coupling is intuitively understood. New results -- showing for strong couplings the existence of a thres
Externí odkaz:
http://arxiv.org/abs/quant-ph/0507004
Autor:
Heiss Wd
Publikováno v:
DMW - Deutsche Medizinische Wochenschrift. 108:887-890
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e09ba987e460f7bd6c0d19f91a459a05
https://doi.org/10.1055/s-2008-1069661
https://doi.org/10.1055/s-2008-1069661
Autor:
Heiss Wd
Publikováno v:
DMW - Deutsche Medizinische Wochenschrift. 111:186-191
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f2896ab68eb16bbdeac2a5dd50842d2
https://doi.org/10.1055/s-2008-1068425
https://doi.org/10.1055/s-2008-1068425
Autor:
Heiss Wd
Cerebral blood flow (CBF) is high (mean of 50 ml/100 g. min) to cover metabolic and energy requirements of the brain. Independent from blood pressure in the systemic circulation CBF is kept constant by autoregulation, but it reacts to changes of arte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b636eae4e65ac8f9a8559fe9240d0867
https://doi.org/10.1159/000400327
https://doi.org/10.1159/000400327
Publikováno v:
Aktuelle Neurologie; 20240101, Issue: Preprints