133 research outputs found
Casimir effect for perfect electromagnetic conductors (PEMCs): A sum rule for attractive/repulsive forces
We discuss the Casimir effect for boundary conditions involving perfect
electromagnetic conductors (PEMCs). Based on the corresponding reciprocal
Green's tensor we construct the Green's tensor for two perfectly reflecting
plates with magnetoelectric coupling (non-reciprocal media) within the
framework of macroscopic quantum electrodynamics. We calculate the Casimir
force between two PEMC plates in terms of the PEMC parameter M and the duality
transformation angle resulting in a universal analytic expression
that connects the attractive Casimir force with the repulsive Boyer force. We
relate the results to the duality symmetry of electromagnetism
Dispersion forces in macroscopic quantum electrodynamics
The description of dispersion forces within the framework of macroscopic
quantum electrodynamics in linear, dispersing, and absorbing media combines the
benefits of approaches based on normal-mode techniques of standard quantum
electrodynamics and methods based on linear response theory in a natural way.
It renders generally valid expressions for both the forces between bodies and
the forces on atoms in the presence of bodies, while showing very clearly the
intimate relation between the different types of dispersion forces. By
considering examples, the influence of various factors like form, size,
electric and magnetic properties, or intervening media on the forces is
addressed. Since the approach based on macroscopic quantum electrodynamics does
not only apply to equilibrium systems, it can be used to investigate dynamical
effects such as the temporal evolution of forces on arbitrarily excited atoms.Comment: 112 pages, 7 figures, 4 tables, extended versio
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