Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-06-28
Phys.Rev.D62:085027,2000
Physics
High Energy Physics
High Energy Physics - Theory
9 pages, Revtex
Scientific paper
10.1103/PhysRevD.62.085027
The zero-point energy of a conducting spherical shell is studied by imposing the axial gauge via path-integral methods, with boundary conditions on the electromagnetic potential and ghost fields. The coupled modes are then found to be the temporal and longitudinal modes for the Maxwell field. The resulting system can be decoupled by studying a fourth-order differential equation with boundary conditions on longitudinal modes and their second derivatives. The exact solution of such equation is found by using a Green-function method, and is obtained from Bessel functions and definite integrals involving Bessel functions. Complete agreement with a previous path-integral analysis in the Lorenz gauge, and with Boyer's value, is proved in detail.
Esposito Giampiero
Kamenshchik Alexander Yu.
Kirsten Klaus
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