Zobrazeno 1 - 10
of 915
pro vyhledávání: '"Brack, M"'
Publikováno v:
Forschungszentrum Rossendorf; FZR-69
Externí odkaz:
https://hzdr.qucosa.de/id/qucosa%3A22046
https://hzdr.qucosa.de/api/qucosa%3A22046/attachment/ATT-0/
https://hzdr.qucosa.de/api/qucosa%3A22046/attachment/ATT-0/
We discuss $Q(n)$, the number of ways a given integer $n$ may be written as a sum of distinct primes, and study its asymptotic form $Q_{as}(n)$ valid in the limit $n\to\infty$. We obtain $Q_{as}(n)$ by Laplace inverting the fermionic partition functi
Externí odkaz:
http://arxiv.org/abs/1904.02776
Publikováno v:
Phys. Scr. 90 (2015) 114011 (8pp)
We have derived an analytical trace formula for the level density of the H\'enon-Heiles potential using the improved stationary phase method, based on extensions of Gutzwiller's semiclassical path integral approach. This trace formula has the correct
Externí odkaz:
http://arxiv.org/abs/1411.2403
Publikováno v:
Pramana 82, 985 (2014)
We propose a phenomenological approach for the equation of state of a unitary Fermi gas. The universal equation of state is parametrised in terms of Fermi-Dirac integrals. This reproduces the experimental data over the accessible range of fugacity an
Externí odkaz:
http://arxiv.org/abs/1302.6316
Publikováno v:
Physics of Atomic Nuclei (Moscow) 74, 1445 (2011)
We first give an overview of the shell-correction method which was developed by V. M. Strutinsky as a practicable and efficient approximation to the general selfconsistent theory of finite fermion systems suggested by A. B. Migdal and collaborators.
Externí odkaz:
http://arxiv.org/abs/1012.0832
Publikováno v:
Phys. Rev. E 81, 011118 (2010)
We investigate the particle and kinetic-energy densities for a system of $N$ fermions bound in a local (mean-field) potential $V(\bfr)$. We generalize a recently developed semiclassical theory [J. Roccia and M. Brack, Phys. Rev.\ Lett. {\bf 100}, 200
Externí odkaz:
http://arxiv.org/abs/0912.4374
Publikováno v:
Phys. Rev. Lett. 63, 255 (1989)
The line shape of the plasma resonance in both neutral and charged small sodium clusters is calculated. The overall properties of the multipeak structure observed in the photoabsorption cross section of spherical Na_8 and Na_20 neutral clusters can b
Externí odkaz:
http://arxiv.org/abs/0910.4576
Publikováno v:
J. Phys. A 43, 255204 (2010)
We investigate the particle and kinetic-energy densities for a system of $N$ fermions confined in a potential $V(\bfr)$. In an earlier paper [J. Phys. A: Math. Gen. {\bf 36}, 1111 (2003)], some exact and asymptotic relations involving the particle de
Externí odkaz:
http://arxiv.org/abs/0903.2172
We derive stability traces of bifurcating orbits in H\'enon-Heiles potentials near their saddles
Comment: LaTeX revtex4, 38 pages, 7 PostScript figures, 2 tables
Comment: LaTeX revtex4, 38 pages, 7 PostScript figures, 2 tables
Externí odkaz:
http://arxiv.org/abs/0804.0118
We consider a few-particle system of trapped neutral fermionic atoms at ultra-low temperatures, with the attractive interaction tuned to Feshbach resonance. We calculate the energies and the spatial densities of the few-body systems using a generalis
Externí odkaz:
http://arxiv.org/abs/0803.1215