Physics – Computational Physics
Scientific paper
2007-04-15
Physical Review Letters, Vol. 99, No. 8, 80401 (2007)
Physics
Computational Physics
Accepted for publication in Physical Review Letters. (Expected publication: Vol. 99 (8) 2007)
Scientific paper
10.1103/PhysRevLett.99.080401
We present a method of computing Casimir forces for arbitrary geometries, with any desired accuracy, that can directly exploit the efficiency of standard numerical-electromagnetism techniques. Using the simplest possible finite-difference implementation of this approach, we obtain both agreement with past results for cylinder-plate geometries, and also present results for new geometries. In particular, we examine a piston-like problem involving two dielectric and metallic squares sliding between two metallic walls, in two and three dimensions, respectively, and demonstrate non-additive and non-monotonic changes in the force due to these lateral walls.
Capasso Federico
Iannuzzi Davide
Ibanescu Mihai
Joannopoulos John D.
Johnson Steven G.
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