Casimir energy for concentric d-d' Spheres

Cavero-Peláez, I. (Universidad de Zaragoza) ; Munoz-Castaneda, J.M. ; Romaniega, C.

Resumen: We study the vacuum interaction of a scalar field and two concentric spheres defined by a singular potential on their surfaces. The potential is a linear combination of the Dirac d and its derivative. The presence of the delta prime term in the potential causes that it behaves differently when it is seen from the inside or from the outside of the sphere. We study different cases for positive and negative values of the delta prime coupling, keeping positive the coupling of the delta. As a consequence, we find regions in the space of couplings, where the energy is positive, negative or zero. Moreover, the sign of the d' couplings cause different behavior on the value of the Casimir energy for different values of the radii. This potential gives rise to general boundary conditions with limiting cases defining Dirichlet and Robin boundary conditions what allows us to simulate purely electric or purely magnetic spheres.

Idioma: Inglés

DOI: 10.1103/PhysRevD.103.045005

Año: 2021

Publicado en: Physical Review D 103, 4 (2021), 045005 [9 pp]
ISSN: 2470-0010

Factor impacto JCR: 5.407 (2021)

Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 7 / 29 = 0.241 (2021) - Q1 - T1
Categ. JCR: ASTRONOMY & ASTROPHYSICS rank: 16 / 69 = 0.232 (2021) - Q1 - T1

Factor impacto CITESCORE: 9.5 - Physics and Astronomy (Q1)

Factor impacto SCIMAGO: 1.677 - Physics and Astronomy (miscellaneous) (Q1) - Nuclear and High Energy Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E21-17R

Tipo y forma: Article (Published version)

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