Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Edilberto O. Silva"'
Publikováno v:
Universe, Vol 9, Iss 3, p 132 (2023)
In this paper, we studied the nonrelativistic quantum mechanics of an electron in a spacetime containing a topological defect. We also considered that the electron is influenced by the Hulthén potential. In particular, we dealt with the Schrödinger
Externí odkaz:
https://doaj.org/article/146220499fc746da850c8313bdb076a4
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 7, Pp 1-15 (2019)
Abstract The Dirac equation with both scalar and vector couplings describing the dynamics of a two-dimensional Dirac oscillator in the cosmic string spacetime is considered. We derive the Dirac-Pauli equation and solve it in the limit of the spin and
Externí odkaz:
https://doaj.org/article/8f02fb87a9cc44e18e3da76123a6debe
Autor:
Márcio M. Cunha, Edilberto O. Silva
Publikováno v:
Advances in High Energy Physics, Vol 2021 (2021)
In this manuscript, we study the relativistic quantum mechanics of an electron in external fields in the spinning cosmic string spacetime. We obtain the Dirac equation and write the first- and second-order equations from it, and then, we solve these
Externí odkaz:
https://doaj.org/article/94d2a4c3a7f44f8e951102c93617e54d
Publikováno v:
Physics Open, Vol 5, Iss , Pp 100045- (2020)
The geometric potential in quantum mechanics has been attracted attention recently, providing a formalism to investigate the influence of curvature in the context of low-dimensional systems. In this paper, we study the consequences of a helicoidal ge
Externí odkaz:
https://doaj.org/article/4d5b3adf078e4d5fa361323b1f8023a5
Autor:
Claudio F. Farias, Edilberto O. Silva
Publikováno v:
Advances in High Energy Physics, Vol 2020 (2020)
The deformed Dirac equation invariant under the κ-Poincaré-Hopf quantum algebra in the context of minimal and scalar couplings under spin and pseudospin symmetry limits is considered. The κ-deformed Pauli-Dirac Hamiltonian allows us to study effec
Externí odkaz:
https://doaj.org/article/6a8d81b98c654aa19a3adeb816cbe594
Publikováno v:
Frontiers in Physics, Vol 7 (2019)
In this work, we review two methods used to approach singular Hamiltonians in (2 + 1) dimensions. Both methods are based on the self-adjoint extension approach. It is very common to find singular Hamiltonians in quantum mechanics, especially in quant
Externí odkaz:
https://doaj.org/article/731981f8ec214b3ab31fae60c6cef8bf
Publikováno v:
Universe, Vol 7, Iss 12, p 457 (2021)
In this paper, we study the effects of rotation in the spin-1/2 non-relativistic Aharonov-Bohm problem for bound states. We use a technique based on the self-adjoint extension method and determine an expression for the energies of the bound states. T
Externí odkaz:
https://doaj.org/article/dd9ecb687a154851ae5453ca9a708b71
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 5, Pp 1-6 (2017)
Abstract In this work we study the Dirac equation with vector and scalar potentials in the spacetime generated by a cosmic string. Using an approximation for the centrifugal term, a solution for the radial differential equation is obtained. We consid
Externí odkaz:
https://doaj.org/article/8d91e713f80f4f4b95672c91de675fa7
Autor:
Márcio M. Cunha, Edilberto O. Silva
Publikováno v:
Universe, Vol 6, Iss 11, p 203 (2020)
In this work, we study the relativistic quantum motion of an electron in the presence of external magnetic fields in the spinning cosmic string spacetime. The approach takes into account the terms that explicitly depend on the particle spin in the Di
Externí odkaz:
https://doaj.org/article/b41f7b54bd2d4b7d8f93e9f5f8299a9b
Publikováno v:
Physics Letters B, Vol 746, Iss , Pp 171-177 (2015)
We have demonstrated that Lorentz-violating terms stemming from the fermion sector of the SME are able to generate geometrical phases on the wave function of electrons confined in 1-dimensional rings, as well as persistent spin currents, in the total
Externí odkaz:
https://doaj.org/article/46308abfa08d477681911ffe0b734db9