98 citations · 573 across the 43 of their papers we have counts for
8 papers · 1 filter
Non-cyclic phases for neutrino oscillations in quantum field theory
Massimo Blasone, Antonio Capolupo, Enrico Celeghini +1
We show the presence of non-cyclic phases for oscillating neutrinos in the context of quantum field theory. Such phases carry information about the non-perturbative vacuum structur…
Quantum Algebras and Quantum Physics
E. Celeghini, M. A. del Olmo
In Quantum Mechanics operators must be hermitian and, in a direct product space, symmetric. These properties are saved by Lie algebra operators but not by those of quantum algebras…
Thermo Field Dynamics and quantum algebras
E. Celeghini, S. De Martino, S. De Siena +3
The algebraic structure of Thermo Field Dynamics lies in the -deformation of the algebra of creation and annihilation operators. Doubling of the degrees of freedom, tilde-conjug…
A universal non-quasitriangular quantization of the Heisenberg group
A. Ballesteros, Enrico Celeghini, F. J. Herranz +2
A universal R--matrix for the quantum Heisenberg algebra h(1)q is presented. Despite of the non--quasitriangularity of this Hopf algebra, the quantum group induced from it coincide…
Exponential mapping for non semisimple quantum groups
F. Bonechi, Enrico Celeghini, R. Giachetti +3
The concept of universal T matrix, recently introduced by Fronsdal and Galindo in the framework of quantum groups, is here discussed as a generalization of the exponential mapping.…
Italian workshop on quantum groups
Enrico Celeghini, M. Tarlini
The first ``Convegno Informale su Quantum Groups'' was held in Florence from February 3 to 6, 1993. This Convegno was conceived as an informal meeting to bring together all the ita…
Quantum algebras and Lie groups
Enrico Celeghini
Lie groups and quantum algebras are connected through their common universal enveloping algebra. The adjoint action of Lie group on its algebra is naturally extended to related q-a…
Heisenberg XXZ Model and Quantum Galilei Group
F. Bonechi, E. Celeghini, R. Giachetti +2
The 1D Heisenberg spin chain with anisotropy of the XXZ type is analyzed in terms of the symmetry given by the quantum Galilei group Gamma_q(1). We show that the magnon excitations…