515 citations · 4.7k across the 212 of their papers we have counts for
6 papers · 1 filter
f-Oscillators and Nonlinear Coherent States
V. I. Man'ko, G. Marmo, E. C. G. Sudarshan +1
The notion of f-oscillators generalizing q-oscillators is introduced. For classical and quantum cases, an interpretation of the f-oscillator is provided as corresponding to a speci…
Defocusing gravitational microlensing
Salvatore Capozziello, Ruggiero de Ritis, Vladimir Mank'o +2
We introduce the notion of defocusing gravitational lens considering a MACHO located behind a light source with respect to an observer. The consequence of defocusing effect is a te…
Luminosity variation in (de)focusing microlensing
Salvatore Capozziello, Ruggiero de Ritis, Vladimir Mank'o +2
The luminosity variation of a stellar source due to the gravitational microlensing effect can be considered also if the light rays are defocused (instead of focused) toward the obs…
Gravitational Waveguides in Cosmology
Salvatore Capozziello, Ruggiero de Ritis, Vladimir Mank'o +2
We discuss the possibility that, besides the usual gravitational lensing, there may exist a sort of gravitational waveguiding in cosmology which could explain some anomalous phenom…
Noether symmetries in Bianchi universes
Salvatore Capozziello, Giuseppe Marmo, Claudio Rubano +1
We use our Nöther Symmetry Approach to study the Einstein equations minimally coupled with a scalar field, in the case of Bianchi universes of class A and B. Possible cases, when s…
Symplectic Structures and Quantum Mechanics
G. Marmo, G. Vilasi
Canonical coordinates for the Schrödinger equation are introduced, making more transparent its Hamiltonian structure. It is shown that the Schrödinger equation, considered as a cla…