Dispersion Forces and Duality
نویسندگان
چکیده
We formulate a symmetry principle on the basis of the duality of electric and magnetic fields and apply it to dispersion forces. Within the context of macroscopic quantum electrodynamics, we rigorously establish duality invariance for the free electromagnetic field in the presence of causal magnetoelectrics. Dispersion forces are given in terms of the Green tensor for the electromagnetic field and the atomic response functions. After discussing the behavior of the Green tensor under a duality transformation, we are able to show that Casimir forces on bodies in free space as well as local-field corrected Casimir–Polder and van der Waals forces are duality invariant.
منابع مشابه
Origins and Applications of London Dispersion Forces and Hamaker Constants in Ceramics
The London dispersion forces, along with the Debye and Keesom forces, constitute the long-range van der Waals forces. London’s and Hamaker’s work on the point-to-point dispersion interaction and Lifshitz’s development of the continuum theory of dispersion are the foundations of our understanding of dispersion forces. Dispersion forces are present for all materials and are intrinsically related ...
متن کاملS-duality and the giant magnon dispersion relation
We use S-duality and planarity to propose an argument for the non-renormalization of the dispersion relation of giant magnon solutions in type IIB string theory on Ad S5 × S5. We compute the spectrum of giant magnons for (p, q)-strings from field theory at strong coupling by using the central charge properties of electrically and magnetically charged supersymmetric states in the Coulomb branch ...
متن کامل0 Quark - Hadron Duality , Factorization and Strong Phases in B 0 d → π + π − Decay
We investigate the hadronic description of the B 0 d → π + π − decay, with the aim to test the validity of quark-hadron duality, the factorization limit and the magnitude of the strong phases. We discuss the derivation of the dispersion relations in the Lehmann-Symanzik-Zimmermann formalism, the Goldberger-Treiman method to include inelastic effects in the spectral function and the consistency ...
متن کاملDispersion and Deposition of Micro Particles over Two Square Obstacles in a Channel via Hybrid Lattice Boltzmann Method and Discrete Phase model
Dispersion and deposition of aerosol particles over two square cylinders confined in a channel in laminar unsteady vortical flow were investigated numerically. Lattice Boltzmann method was used to calculate fluid characteristics and modify Euler method was employed as Lagrangian particle tracing procedure to obtain particle trajectories. Drag, Saffman lift, gravity, buoyancy and Brownian motion...
متن کاملAn Optimal Method of Galerkin Type for Diffusion-dispersion Problems
The aim of this paper is the study of steady state fluid flow and transport (diffusion and dispersion) of pollutants in porous media. The mathematical model of this phenomena yields to some elliptic equations with boundary conditions. In this paper we present a projection method of Galerkin type for solving such elliptic equations. The originality of the work consists in the choice of the syste...
متن کامل