Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Javier Negro"'
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 8, p 082 (2012)
The intertwining technique has been widely used to study the Schrödinger equation and to generate new Hamiltonians with known spectra. This technique can be adapted to find the bound states of certain Dirac Hamiltonians. In this paper the system to
Externí odkaz:
https://doaj.org/article/67c75af055a446d7aa78437c716906dc
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 5, p 039 (2009)
We present an algebraic study of a kind of quantum systems belonging to a family of superintegrable Hamiltonian systems in terms of shape-invariant intertwinig operators, that span pairs of Lie algebras like (su(n),so(2n)) or (su(p,q),so(2p,2q)). The
Externí odkaz:
https://doaj.org/article/a71d827abca44058a28eaba7b531be72
In this paper, a simple method is proposed to get analytical solutions (or with the help of a finite numerical calculations) of the Dirac-Weyl equation for low energy electrons in graphene in the presence of certain electric and magnetic fields. In o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::340d4b834d1468ef162d880a7ffd46ab
Publikováno v:
The European Physical Journal Plus. 136
In this work, we have extended the factorization method of scalar shape-invariant Schrodinger Hamiltonians to a class of Dirac-like matrix Hamiltonians. The intertwining operators of the Schrodinger equations have been implemented in the Dirac-like s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ace1c6014657e6a1863f6e6070e9d878
https://doi.org/10.1140/epjp/s13360-021-01642-2
https://doi.org/10.1140/epjp/s13360-021-01642-2
In this work we describe semiclassical states in graphene under a constant perpendicular magnetic field by constructing coherent states in the Barut-Girardello sense. Since we want to keep track of the angular momentum, the use of the symmetric gauge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2459562a8221fde0c9417f11ae5e6e28
We analyze the structure of the scattering matrix, $S(k)$, for the one dimensional Morse potential. We show that, in addition to a finite number of bound state poles and an infinite number of anti-bound poles, there exist an infinite number of redund
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b57cc6712c55b39df4712b15f7c759c8
We characterize the symmetry algebra of the generic superintegrable system on a pseudo-sphere corresponding to the homogeneous space $SO(p,q+1)/SO(p,q)$ where $p+q={\cal N}$, ${\cal N}\in\mathbb N$. We show that this algebra is independent of the sig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6decf39bc04b235615d06c7b7fc729b4
Publikováno v:
Physics of Atomic Nuclei. 80:389-396
The factorization technique for superintegrable Hamiltonian systems is revisited and applied in order to obtain additional (higher-order) constants of the motion. In particular, the factorization approach to the classical anisotropic oscillator on th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1ec9f9c8091364c5d4f91dd2c5631a8
https://doi.org/10.1134/s1063778817020053
https://doi.org/10.1134/s1063778817020053
Publikováno v:
UVaDOC. Repositorio Documental de la Universidad de Valladolid
Consejo Superior de Investigaciones Científicas (CSIC)
Consejo Superior de Investigaciones Científicas (CSIC)
We study in detail the relationship between the Tavis-Cummings Hamiltonian of quantum optics and a family of quasi-exactly solvable Schrodinger equations. The connection between them is established through the biconfluent Heun equation. We found that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::440ae949c744beaf36aa678a8980e70c
https://doi.org/10.1140/epjp/i2019-12753-4
https://doi.org/10.1140/epjp/i2019-12753-4
Publikováno v:
UVaDOC. Repositorio Documental de la Universidad de Valladolid
instname
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Producción Científica
We employ a symmetric gauge to describe the interaction of electrons in graphene with a magnetic field which is orthogonal to the layer surface and to build the so-called partial and bidimensional coherent states for this
We employ a symmetric gauge to describe the interaction of electrons in graphene with a magnetic field which is orthogonal to the layer surface and to build the so-called partial and bidimensional coherent states for this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46e930f194a5d879672b1589f37c60f2
https://doi.org/10.1088/1742-6596/1194/1/012025
https://doi.org/10.1088/1742-6596/1194/1/012025