Zobrazeno 1 - 10
of 279
pro vyhledávání: '"Roussev, R."'
Publikováno v:
Internat. J. Theoret. Phys. 34 (1995), no. 11, p. 2195-2204
A natural embedding $A_{m-1}\oplus A_{n-1}\subset A_{mn-1}$ for the corresponding quantum algebras is constructed through the appropriate comultiplication on the generators of each of the $A_{m-1}$ and $A_{n-1}$ algebras. The above embedding is prove
Externí odkaz:
http://arxiv.org/abs/math/0209243
Autor:
Roussev, R., Millis, A. J.
A realistic theory of the quantum paraelectric - ferroelectric transition is presented, involving parameters determined from band calculations and a renormalization group treatment of critical fluctuations. The effects of reduced dimensionality and d
Externí odkaz:
http://arxiv.org/abs/cond-mat/0112453
Autor:
Bonatsos, Dennis, Daskaloyannis, C., Drenska, S. B., Fotiades, N., Minkov, N., Raychev, P. P., Roussev, R. P.
Publikováno v:
Algebraic Methods in Nuclear Theory, ed. A. N. Antonov (Heron Press, Sofia, 2002) 89-111
``Beat'' patterns are shown to appear in the octupole bands of several actinides and rare earths, their appearance being independent from the formula used in order to isolate and demonstrate them. It is shown that the recent formalism, making use of
Externí odkaz:
http://arxiv.org/abs/nucl-th/0111003
Autor:
Bonatsos, D., Karoussos, N., Daskaloyannis, C., Drenska, S. B., Minkov, N., Raychev, P. P., Roussev, R. P., Maruani, J.
Publikováno v:
Prog. Theor. Chem. Phys. 6 : New Trends in Quantum Systems in Chemistry and Physics, ed. J. Maruani, C. Minot, R. McWeeny, Y. G. Smeyers, and S. Wilson, Vol. I (Kluwer, Dordrecht, 2001) p. 393.
It is shown that the recently observed Delta J = 2 staggering effect (i.e. the relative displacement of the levels with angular momenta J, J+4, J+8, ..., relatively to the levels with angular momenta J+2, J+6, J+10, ...) seen in superdeformed nuclear
Externí odkaz:
http://arxiv.org/abs/physics/0106015
'Beat' patterns for the odd-even staggering in octupole bands from a quadrupole-octupole Hamiltonian
Publikováno v:
Phys. Rev. C 63 (2001) 044305
We propose a collective Hamiltonian which incorporates the standard quadrupole terms, octupole terms classified according to the irreducible representations of the octahedron group, a quadrupole-octupole interaction, as well as a term for the bandhea
Externí odkaz:
http://arxiv.org/abs/nucl-th/0106008
Autor:
Bonatsos, D., Daskaloyannis, C., Drenska, S. B., Karoussos, N., Maruani, J., Minkov, N., Raychev, P. P., Roussev, R. P.
Publikováno v:
Phys.Rev. A60 (1999) 253
It is shown that the recently observed Delta I = 2 staggering seen in superdeformed nuclear bands is also occurring in certain electronically excited rotational bands of diatomic molecules. In the case of diatomic molecules the effect is attributed t
Externí odkaz:
http://arxiv.org/abs/physics/0106001
We propose a collective Hamiltonian which incorporates interactions capable to generate rotations in nuclei with simultaneous presence of octupole and quadrupole deformations. It is demonstrated that the model formalism could be applied to reproduce
Externí odkaz:
http://arxiv.org/abs/nucl-th/0106001
Autor:
Bonatsos, D., Daskaloyannis, C., Drenska, S. B., Karoussos, N., Minkov, N., Raychev, P. P., Roussev, R. P.
Publikováno v:
Phys. Rev. C 62 (2000) 024301. Erratum Phys. Rev. C 63 (2001) 049902.
The Delta I = 1 staggering (odd--even staggering) in octupole bands of light actinides is found to exhibit a ``beat'' behaviour as a function of the angular momentum I, forcing us to revise the traditional belief that this staggering decreases gradua
Externí odkaz:
http://arxiv.org/abs/nucl-th/0105077
We study the fine structure of nuclear rotational spectra on the basis of both dynamical and discrete symmetry approaches. In this framework we show that the odd--even (Delta I = 1) staggering effects observed in various rotational bands carry detail
Externí odkaz:
http://arxiv.org/abs/nucl-th/0105073
Publikováno v:
Condensed Matter Theor. 15 (2000) 25
Quantum algebras (also called quantum groups) are deformed versions of the usual Lie algebras, to which they reduce when the deformation parameter q is set equal to unity. From the mathematical point of view they are Hopf algebras. Their use in physi
Externí odkaz:
http://arxiv.org/abs/quant-ph/0105143