From: Julie Aston (julie@math.missouri.edu)
Date: Wed Nov 07 2007 - 10:35:32 CST
Colloquium
Department of Mathematics
Allan Greenleaf
University of Rochester
Cloaking Devices and Electromagnetic Wormholes:
The Mathematics and Physics of Invisibility
Abstract: The last year has seen a flurry of theoretical, numerical and
even experimental work on invisibility, or cloaking. Mathematically, one
approach involves looking at solutions of the conductivity, Helmholtz or
Maxwell's equations with certain degenerate coefficients coming from
singular changes of variables. In physics, this is the basis for a
rapidly growing field often referred to as "transformation optics". I
will describe a general method for designing and rigorously analyzing
transformation-based optical devices. Finally, recent work on
electromagnetic wormholes, which are (mostly) invisible tunnels allowing
waves to pass from one region to another will be described. This is
joint work with Yaroslav Kurylev, Matti Lassas and Gunther Uhlmann.
Thursday, November 8th
3:30 p.m.
105 Strickland (formerly GCB)
Refreshments will be served at 3:00 p.m.
in Room 326 Mathematical Sciences (Math Lounge).
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