Bound-state solutions for the charged Dirac oscillator in a rotating frame in the Bonnor-Melvin-Lambda spacetime

Abstract

In this paper, we determine the relativistic bound-state solutions for the charged (DO) Dirac oscillator in a rotating frame in the Bonnor-Melvin-Lambda spacetime in $(2+1)$-dimensions, where such solutions are given by the two-component normalizable Dirac spinor and by the relativistic energy spectrum. To analytically solve our problem, we consider two approximations, where the first is that the cosmological constant is very small (conical approximation), and the second is that the linear velocity of the rotating frame is much less than the speed of light (slow rotation regime). After solving a second-order differential equation, we obtain a generalized Laguerre equation, whose solutions are the generalized Laguerre polynomials. Consequently, we obtain the energy spectrum, which is quantized in terms of the radial and total magnetic quantum numbers $n$ and $m_j$, and depends on the angular frequency $\omega$ (describes the DO), cyclotron frequency ${\omega }_c$ (describes the external magnetic field), angular velocity $\Omega$ (describes the rotating frame), spin parameter $s$ (describes the ``spin''), spinorial parameter $u$ (describes the components of the spinor), effective rest mass $m_{eff}$ (describes the rest mass modified by the spin-rotation coupling), and on a real parameter $\sigma$ and cosmological constant $\Lambda$ (describes the Bonnor-Melvin-Lambda spacetime). In particular, we note that this spectrum is asymmetrical (due to $\Omega$) and has its degeneracy broken (due to $\sigma$ and $\Lambda$). Besides, we also graphically analyze the behavior of the spectrum and of the probability density as a function of the parameters of the system for different values of $n$ and $m_j$.

34 pages, and 21 figures

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