Nonperturbative and Symmetry Methods in QFT: Applications to Actual Physical Problems, in Particular, to Physics of Nanostructures

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (15 June 2023) | Viewed by 1982

Special Issue Editor


E-Mail
Guest Editor
1. I.E. Tamm Theory Division, The P.N. Lebedev Physical Institute, 53 Leninsky Pr., 119991 Moscow, Russia
2. Institute of Physics, The University of Sao Paulo, São Paulo 05508-070, Brazil
Interests: QFT with strong external backgrounds; theory of constrained systems and their quantization; exact solutions of relativistic wave equations and theory of self-adjoint extensions; path integrals in quantum theory; coherent states; classical and pseudoclassical models of relativistic particles; theory of finite level systems and its applications to quantum information; quantum mechanics and field theory in noncommutative spaces
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of Symmetry is dedicated to articles reflecting progress in the following directions: quantization of gauge theories; symmetries in Hamiltonian and Lagrangian formulations of gauge theories; nonperturbative approaches to strong-field QFT and its applications to nanostructure physics; new solutions to relativistic wave equations and their applications; theory of self-adjoint extensions and its applications to physical problems; challenges in quantum information theory; and development of semiclassical methods in quantum theory.

We also seek contributions describing effects of particle creation by strong fields from the vacuum in high-energy physics and astrophysics, spontaneous production of electron–positron pairs by supercritical Coulomb fields, and similar effects in the physics of graphene and other nanostructures. The study of quantum effects in the evolution of particles and fields in curved spacetimes is of particular interest.

Prof. Dr. Dmitry Gitman
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • symmetry
  • nonperturbative methods
  • strong-field QFT
  • graphene physic
  • quantum information
  • entanglement
  • quantization
  • gauge theories
  • Dirac equation

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

12 pages, 676 KiB  
Article
Particle Production in Strong Electromagnetic Fields and Local Approximations
by Ivan A. Aleksandrov, Denis G. Sevostyanov and Vladimir M. Shabaev
Symmetry 2022, 14(11), 2444; https://doi.org/10.3390/sym14112444 - 18 Nov 2022
Cited by 4 | Viewed by 1187
Abstract
We investigate the phenomenon of electron–positron pair production in intense external backgrounds within the strong-field regime. We perform nonperturbative calculations by solving the quantum kinetic equations, and obtain the momentum distributions of particles created and the total number of pairs. In particular, we [...] Read more.
We investigate the phenomenon of electron–positron pair production in intense external backgrounds within the strong-field regime. We perform nonperturbative calculations by solving the quantum kinetic equations, and obtain the momentum distributions of particles created and the total number of pairs. In particular, we analyze the validity of the locally constant field approximation (LCFA), which represents a powerful method for treating inhomogeneous external backgrounds. We consider a combination of two consecutive time-dependent Sauter pulses and thoroughly examine the effects of quantum interference and the role of the Pauli exclusion principle. It is shown that the latter can be approximately incorporated within the LCFA when computing the momentum distributions, while the closed-form LCFA expression for the total particle yield completely disregards Pauli blocking. It is demonstrated that in the presence of multiple turning points of classical electron trajectories, one observes interference patterns in the particle spectra, and the LCFA may significantly overestimate the number of pairs. To further elaborate this issue, we perform the analogous calculations in the case of scalar QED. It is shown that the quantum statistics effects enhance the number of bosons produced. Full article
Show Figures

Figure 1

Back to TopTop