Quantum electromagnetic stress tensor in an inhomogeneous medium

Parashar, P. ; Milton, K.A. ; Li, Y. ; Day, H. ; Guo, X. ; Fulling, S.A. ; Cavero-Peláez, I. (Universidad de Zaragoza)

Resumen: Continuing a program of examining the behavior of the vacuum expectation value of the stress tensor in a background which varies only in a single direction, we here study the electromagnetic stress tensor in a medium with permittivity depending on a single spatial coordinate, specifically, a planar dielectric half-space facing a vacuum region. There are divergences occurring that are regulated by temporal and spatial point splitting, which have a universal character for both transverse electric and transverse magnetic modes. The nature of the divergences depends on the model of dispersion adopted. And there are singularities occurring at the edge between the dielectric and vacuum regions, which also have a universal character, depending on the structure of the discontinuities in the material properties there. Remarks are offered concerning renormalization of such models, and the significance of the stress tensor. The ambiguity in separating "bulk" and "scattering" parts of the stress tensor is discussed.

Idioma: Inglés

DOI: 10.1103/PhysRevD.97.125009

Año: 2018

Publicado en: PHYSICAL REVIEW D 97, 12 (2018), 125009 [19 pp]
ISSN: 2470-0010

Factor impacto JCR: 4.368 (2018)

Categ. JCR: ASTRONOMY & ASTROPHYSICS rank: 17 / 69 = 0.246 (2018) - Q1 - T1
Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 7 / 29 = 0.241 (2018) - Q1 - T1

Factor impacto SCIMAGO: 1.703 - Physics and Astronomy (miscellaneous) (Q1)

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Teórica (Dpto. Física Teórica)