Dirac equation with Morse potetnial under the influence of
position-dependent mass and local Fermi velocity
- URL: http://arxiv.org/abs/2201.05296v1
- Date: Fri, 14 Jan 2022 04:04:11 GMT
- Title: Dirac equation with Morse potetnial under the influence of
position-dependent mass and local Fermi velocity
- Authors: Bijan Bagchi, Rahul Ghosh
- Abstract summary: We take the Fermi velocity as a local variable and examine the combined effects of the two on the solvability of the Dirac equation.
Our results for the wave functions and the energy levels corresponding to such an extended scheme are furnished in closed forms.
- Score: 0.4061135251278187
- License: http://creativecommons.org/publicdomain/zero/1.0/
- Abstract: We solve the one-dimensional Dirac equation by taking into account the
possibility of position-dependence in the mass function. We also take the Fermi
velocity to act as a local variable and examine the combined effects of the two
on the solvability of the Dirac equation with respect to the Morse potential.
Our results for the wave functions and the energy levels corresponding to such
an extended scheme are furnished in closed forms.
Related papers
- Leading correction to the relativistic Foldy-Wouthuysen Hamiltonian [55.2480439325792]
We rigorously derive a leading correction in the weak-field approximation to the known relativistic Foldy-Wouthuysen Hamiltonian.
For Dirac particles, the relativistic wave equation of the second order is obtained with the correction similar to that to the Foldy-Wouthuysen Hamiltonian.
arXiv Detail & Related papers (2024-08-03T12:53:41Z) - Minimally coupled fermion-antifermion pairs via exponentially decaying potential [0.0]
We study how a fermion-antifermion ($foverlinef$) pair interacts via an exponentially decaying potential.
We find that such interacting $foverlinef$ systems are unstable and decay over time, with the decay time depending on the Compton wavelength of the fermions.
arXiv Detail & Related papers (2024-07-31T13:47:16Z) - Moving mirror-field dynamics under intrinsic decoherence [77.34726150561087]
We study the decaying dynamics in the mirror-field interaction by means of the intrinsic decoherence scheme.
We show expectation values, correlations, and Husimi functions for the solutions obtained.
arXiv Detail & Related papers (2023-05-06T03:41:45Z) - Something new about radial wave functions of fermions in the repulsive
Coulomb field [0.0]
An impermeable barrier at r=r_cl in the effective potential of the relativistic Schr"odinger-type equation leads to exclusion of the range 0 leq r r_cl from the wave function domain.
We obtain new solutions to the Dirac equation in the Coulomb repulsive field.
arXiv Detail & Related papers (2023-01-13T05:52:33Z) - So (2, 1) algebra, local Fermi velocity, and position-dependent mass
Dirac equation [0.3437656066916039]
We investigate the (1+1)-dimensional position-dependent mass Dirac equation within the confines of so(2,1) potential algebra.
We examine the combined effects of the two when the Dirac equation is equipped with an external pseuodoscalar potential.
arXiv Detail & Related papers (2022-05-04T11:56:33Z) - Two electrons in harmonic confinement coupled to light in a cavity [62.997667081978825]
The energy and wave function of a harmonically confined two-electron system coupled to light is calculated.
Relative motion wave function has a known quasi-analytical solution.
arXiv Detail & Related papers (2021-08-03T18:56:50Z) - Position-dependent mass Dirac equation and local Fermi velocity [0.4061135251278187]
We present a new approach to study (1+1)-dimensional Dirac equation in the background of an effective mass $M$.
We explore the resulting structure of the coupled equations and arrive at an interesting constraint of $M$ turning out to be the inverse square of $v_f$.
arXiv Detail & Related papers (2021-07-04T15:46:10Z) - Machine Learning S-Wave Scattering Phase Shifts Bypassing the Radial
Schr\"odinger Equation [77.34726150561087]
We present a proof of concept machine learning model resting on a convolutional neural network capable to yield accurate scattering s-wave phase shifts.
We discuss how the Hamiltonian can serve as a guiding principle in the construction of a physically-motivated descriptor.
arXiv Detail & Related papers (2021-06-25T17:25:38Z) - New approach to describe two coupled spins in a variable magnetic field [55.41644538483948]
We describe the evolution of two spins coupled by hyperfine interaction in an external time-dependent magnetic field.
We modify the time-dependent Schr"odinger equation through a change of representation.
The solution is highly simplified when an adiabatically varying magnetic field perturbs the system.
arXiv Detail & Related papers (2020-11-23T17:29:31Z) - Anomalous states of positronium [0.0]
The energies and wave functions of the two-body Dirac equation for positronium are compared.
The unusual behavior of the ground-state wave function of the Dirac equation is explained in terms of anomalous bound-state solutions.
arXiv Detail & Related papers (2020-04-12T02:35:14Z) - Casimir force between Weyl semimetals in a chiral medium [68.8204255655161]
We study the Casimir effect in a system composed of two Weyl semimetals separated by a gap filled with a chiral medium.
We find that if the medium between the two WSMs is a Faraday material, a repulsive Casimir force can be obtained.
arXiv Detail & Related papers (2020-01-28T14:08:45Z)
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.