Eur. Phys. J. Plus (2021) 136: 765
https://doi.org/10.1140/epjp/s13360-021-01753-w

Regular Article

Coherent states for dispersive pseudo-Landau-levels in strained honeycomb lattices

¹ Departamento de Formación Básica Disciplinaria, Unidad Profesional Interdisciplinaria de Ingeniería Campus Hidalgo del Instituto Politécnico Nacional, Pachuca: Ciudad del Conocimiento y la Cultura, Carretera Pachuca-Actopan km 1 + 500, 42162, San Agustín Tlaxiaca, Hidalgo, Mexico
² Departamento de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México, 04510, Mexico City, Mexico

^a ediazba@ipn.mx

Received: 9 March 2021
Accepted: 12 July 2021
Published online: 23 July 2021

Abstract

Dirac fermions in graphene may experiment dispersive pseudo-Landau levels due to a homogeneous pseudomagnetic field and a position-dependent Fermi velocity induced by strain. In this paper, we study the (semi-classical) dynamics of these particles under such a physical context from an approach of coherent states. For this purpose we use a Landau-like gauge to built Perelomov coherent states by the action of a non-unitary displacement operator $D(\alpha )$ on the fundamental state of the system. We analyze the time evolution of the probability density and the generalized uncertainty principle as well as the Wigner function for the coherent states. Our results show how x-momentum dependency affects the motion periodicity and the Wigner function shape in phase space.