Zobrazeno 71 - 80
of 857
pro vyhledávání: '"Volya, A."'
Autor:
Volya, Alexander, Zelevinsky, Vladimir
Publikováno v:
Nuclei at the Limits 2004, American Institute of Physics Conference Proceedings Series
A brief overview is given of the Continuum Shell Model, a novel approach that extends the traditional nuclear shell model into the domain of unstable nuclei and nuclear reactions. While some of the theoretical aspects, such as role and treatment of o
Externí odkaz:
http://arxiv.org/abs/nucl-th/0409079
Autor:
Volya, Alexander, Zelevinsky, Vladimir
Publikováno v:
Phys.Rev.Lett. 94 (2005) 052501
A new version of the nuclear shell model unifies the consideration of the discrete spectrum, where the results agree with the standard shell model, and continuum. The ingredients of the method are the non-Hermitian effective Hamiltonian, energy-depen
Externí odkaz:
http://arxiv.org/abs/nucl-th/0408026
Autor:
Zelevinsky, Vladimir, Volya, Alexander
The phenomenon of super-radiance in quantum optics predicted by Dicke 50 years ago and observed experimentally has its counterparts in many-body systems on the borderline between discrete spectrum and continuum. The interaction of overlapping resonan
Externí odkaz:
http://arxiv.org/abs/nucl-th/0406019
Publikováno v:
Phys.Lett. B590 (2004) 45-50
It is suggested that the narrow width of the recently observed resonance $\Theta^{+}(1540)$ with strangeness $S=+1$ could be a result of the super-radiance mechanism of the redistribution of the widths of overlapping resonances due to their coupling
Externí odkaz:
http://arxiv.org/abs/nucl-th/0310029
Autor:
Zelevinsky, Vladimir, Volya, Alexander
Publikováno v:
Phys.Rept.391:311-352,2004
Standard concepts of nuclear physics explaining the systematics of ground state spins in nuclei by the presence of specific coherent terms in the nucleon-nucleon interaction were put in doubt by the observation that these systematics can be reproduce
Externí odkaz:
http://arxiv.org/abs/nucl-th/0309071
Autor:
Volya, Alexander, Zelevinsky, Vladimir
Publikováno v:
Phys.Lett. B574 (2003) 27-34
We study phase transformations in finite nuclei as a function of interaction parameters. The signature of a transition is given by invariant correlational entropy that reflects the sensitivity of an individual many-body state to changes of external p
Externí odkaz:
http://arxiv.org/abs/nucl-th/0307028
Autor:
Volya, Alexander, Zelevinsky, Vladimir
We study the dynamics of a complex open quantum many-body system. The coupling to external degrees of freedom can be viewed as a coupling to a radiation field, to continuum states or to a measuring apparatus. This perturbation is treated in terms of
Externí odkaz:
http://arxiv.org/abs/quant-ph/0303078
Autor:
Zelevinsky, Vladimir, Volya, Alexander
Nuclear pairing correlations are known to play an important role in various single-particle and collective aspects of nuclear structure. After the first idea by A. Bohr, B. Mottelson and D. Pines on similarity of nuclear pairing to electron supercond
Externí odkaz:
http://arxiv.org/abs/nucl-th/0303010
Autor:
Volya, Alexander, Zelevinsky, Vladimir
Publikováno v:
Acta Phys.Hung. A19 (2004) 221-225
New features related to collective properties generated in the systems driven by random dynamics are observed and their implications for further understanding of interplay between coherence and chaos are discussed.
Comment: 4 pages, 3 figures
Comment: 4 pages, 3 figures
Externí odkaz:
http://arxiv.org/abs/nucl-th/0301056
Autor:
Volya, Alexander, Esbensen, Henning
Publikováno v:
Phys.Rev. C66 (2002) 044604
In this work we study the problem of a charged particle, bound in a harmonic-oscillator potential, being excited by the Coulomb field from a fast charged projectile. Based on a classical solution to the problem and using the squeezed-state formalism
Externí odkaz:
http://arxiv.org/abs/nucl-th/0301057