arXiv subjects

Riccardo Droghei

Publications and source records attributed to Riccardo Droghei.

4 recordsLinked to original sources

arXiv2025

Deformed Boson Algebras and $\mathcal{W}_{α,β,ν}$-Coherent States: A New Quantum Framework

We introduce a novel class of coherent states, termed $\mathcal{W}^{(\barα,\barν)}(z)$-coherent states, constructed using a deformed boson algebra based on the generalized factorial $[n]_{α,β,ν}!$. This algebra extends conventional factorials, incorporating advanced special functions such as the Mittag-Leffler and Wright functions, enabling the exploration of a broader class of quantum states. The mathematical properties of these states, including their continuity, completeness, and quantum fluctuations, are analyzed. A key aspect of this work is the resolution of the Stieltjes moment problem associated with these states, achieved through the inverse Mellin transformation method. The framework provides insights into the interplay between classical and quantum regimes, with potential applications in quantum optics and fractional quantum mechanics. By extending the theoretical landscape of coherent states, this study opens avenues for further exploration in mathematical physics and quantum technologies.

math.QA↗

arXiv2024

A note on exact results for Burgers-like equations involving Laguerre derivatives

In this note, we consider some Burgers-like equations involving Laguerre derivatives and demonstrate that it is possible to construct specific exact solutions using separation of variables. We prove that a general scheme exists for constructing exact solutions for these Burgers-like equations, extending to more general cases, including nonlinear time-fractional equations. Exact solutions can also be obtained for KdV-like equations involving Laguerre derivatives. We finally consider a particular class of Burgers equations with variable coefficients whose solution can be obtained similarly.

math.GM↗

arXiv2023

Properties of the multi-index special function $\mathcal{W}^{\left(\barα,\barν\right)}(z)$

In this paper, we investigate some properties related to a multi-index special function $\mathcal{W}^{\left(\barα,\barν\right)}$ that arose from an eigenvalue problem for a multi-order fractional hyper-Bessel operator, involving Caputo fractional derivatives. We show that for particular values of the parameters involved in this special function $\mathcal{W}^{\left(\barα,\barν\right)}$, this leads to the hyper-Bessel function of Delerue. The Laplace transform of the $\mathcal{W}^{\left(\barα,\barν\right)}$ is discussed obtaining, in particular cases, the well-known functional relation between hyper-Bessel function and multi-index Mittag-Leffler function, or, quite simply, between classical Wright and Mittag-Leffler functions. Moreover, it is shown that the multi-index special function satisfies the recurrence relation involving fractional derivatives. In a particular case, we derive, to the best of our knowledge, a new differential recurrence relation for the Mittag-Leffler function. We also provide derivatives of the 3-parameters function $\mathcal{W}_{α,β,ν}$ with respect to parameters, leading to infinite power series with coefficients being quotients of digamma and gamma functions.

math.GM↗

arXiv2021

On a solution of a fractional hyper-Bessel differential equation by means of a multi-index special function

In this paper, we introduce a new multiple-parameters (multi-index) extension of the Wright function that arises from an eigenvalue problem for a case of hyper-Bessel operator involving Caputo fractional derivatives. We show that by giving particular values to the parameters involved in this special function, this leads to some known special functions (as the classical Wright function, the $α$-Mittag-Leffer function, the Tricomi function, etc.) that on their turn appear as cases of the so-called multi-index Mittag-Leffer functions. As an application, we mention that this new generalization Wright function is an isochronous solution of a nonlinear fractional partial differential equation.

math.GM↗