Dirac systems with magnetic field and position dependent mass: Darboux
transformations and equivalence with generalized Dirac oscillators
- URL: http://arxiv.org/abs/2102.13561v1
- Date: Fri, 26 Feb 2021 16:04:42 GMT
- Title: Dirac systems with magnetic field and position dependent mass: Darboux
transformations and equivalence with generalized Dirac oscillators
- Authors: Axel Schulze-Halberg and Pinaki Roy
- Abstract summary: We construct a Darboux transformation for a class of two-dimensional Dirac systems at zero energy.
Our starting equation features a position-dependent mass, a matrix potential, and an additional degree of freedom.
We obtain a number of Darbouxtransformed Dirac equations for which the zero energy solutions are exactly known.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We construct a Darboux transformation for a class of two-dimensional Dirac
systems at zero energy. Our starting equation features a position-dependent
mass, a matrix potential, and an additional degree of freedom that can be
interpreted either as a magnetic field perpendicular to the plane or a
generalized Dirac oscillator interaction. We obtain a number of
Darbouxtransformed Dirac equations for which the zero energy solutions are
exactly known.
Related papers
- Generalized Gouy Rotation of Electron Vortex beams in uniform magnetic fields [54.010858975226945]
We study the dynamics of EVBs in magnetic fields using exact solutions of the relativistic paraxial equation in magnetic fields.
We provide a unified description of different regimes under generalized Gouy rotation, linking the Gouy phase to EVB rotation angles.
This work offers new insights into the dynamics of EVBs in magnetic fields and suggests practical applications in beam manipulation and beam optics of vortex particles.
arXiv Detail & Related papers (2024-07-03T03:29:56Z) - Decoupling of External and Internal Dynamics in Driven Two-level Systems [49.96265870315999]
We show how a laser driven two-level system can be decoupled into a set of equations acting only on the external degrees of freedom for each state.
We give a way of characterizing the solvability of this family of problems by appealing to a classical oscillator with time-dependent damping.
We show that chirping of the driving fields phase emerges naturally as a means of compensating the Ehrenfest/mean-value part of the detuning operator's dynamics.
arXiv Detail & Related papers (2024-06-03T16:42:28Z) - Biquaternion representation of the spin one half and its application on
the relativistic one electron atom [65.268245109828]
In this work we represent the $1/2$ Spin particles with complex quaternions.
We determine the states, rotation operators and the total angular momentum function in the complex quaternion space.
arXiv Detail & Related papers (2024-02-28T19:24:13Z) - The Electronic and Electromagnetic Dirac Equations [4.486708382818381]
Maxwell's equations and the Dirac equation are the first-order differential relativistic wave equation for electromagnetic waves and electronic waves respectively.
We show that the Maxwell equations can be written in an exact form of the Dirac equation by representing the four Dirac operators with $8times8$ matrices.
arXiv Detail & Related papers (2023-08-03T16:47:27Z) - Dirac materials in parallel non-uniform electromagnetic fields generated
by SUSY: A new class of chiral Planar Hall Effect? [0.0]
We find a nontrivial current density in the same plane where the electric and magnetic fields lie, but perpendicular to both of them.
This density is the sum of current densities for the left- and right-chiralities, suggesting that the net current is a consequence of chiral symmetry.
arXiv Detail & Related papers (2023-06-28T17:48:56Z) - Physics-constrained 3D Convolutional Neural Networks for Electrodynamics [77.34726150561087]
We create a 3D convolutional PCNN to map time-varying current and charge densities J(r,t) and p(r,t) to vector and scalar potentials A(r,t) and V(r,t)
We generate electromagnetic fields according to Maxwell's equations: B=curl(A), E=-div(V)-dA/dt.
arXiv Detail & Related papers (2023-01-31T15:51:28Z) - Dimensional reduction of the Dirac theory [0.0]
We perform a reduction from three to two spatial dimensions of the physics of a spin-1/2 fermion coupled to the electromagnetic field.
We consider first the free case, in which motion is determined by the Dirac equation, and then the coupling with a dynamical electromagnetic field.
arXiv Detail & Related papers (2022-11-15T23:55:10Z) - Construction of Dirac spinors for electron vortex beams in background
electromagnetic fields [0.0]
Exact solutions of the Dirac equation, a system of four partial differential equations, are rare.
Given the growing number of applications of high energy electron beams interacting with a variety of quantum systems in laser fields, novel methods for finding exact solutions to the Dirac equation are called for.
We present a method for building up solutions to the Dirac equation employing a recently introduced approach for the description of spinorial fields and their driving electromagnetic fields in terms of geometric algebras.
arXiv Detail & Related papers (2020-11-25T11:55:37Z) - Darboux partners of Heun-class potentials for the two-dimensional
massless Dirac equation [0.0]
We construct new exactly-solvable cases of the two-dimensional massless Dirac equation for potential classes of Lambert-W and inverse exponential type.
arXiv Detail & Related papers (2020-11-12T15:28:45Z) - General quantum-mechanical solution for twisted electrons in a uniform
magnetic field [68.8204255655161]
A theory of twisted (and other structured) paraxial electrons in a uniform magnetic field is developed.
The observable effect of a different behavior of relativistic Laguerre-Gauss beams with opposite directions of the orbital angular momentum penetrating from the free space into a magnetic field is predicted.
arXiv Detail & Related papers (2020-05-13T16:35:10Z) - Spin current generation and control in carbon nanotubes by combining
rotation and magnetic field [78.72753218464803]
We study the quantum dynamics of ballistic electrons in rotating carbon nanotubes in the presence of a uniform magnetic field.
By suitably combining the applied magnetic field intensity and rotation speed, one can tune one of the currents to zero while keeping the other one finite, giving rise to a spin current generator.
arXiv Detail & Related papers (2020-01-20T08:54:56Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.