Analysis of an enhanced approximate cloaking scheme for the conductivity problem

Abstract

We extend and analyse an enhanced approximate cloaking scheme, which was recently introduced by Ammari, Kang, Lee and Lim [Comm. Math. Phys. 317(1) (2013), 253–266] to cloak a domain with a fixed, homogeneous Neumann boundary condition. Subject to the solvability of a finite set of algebraic equations we construct an approximate cloak for the two dimensional transmission case, which achieves invisibility of the order ρ^2N+2 while maintaining the same level of local anisotropy as earlier schemes of order ρ² [Inverse Problems 24(1) (2008), 015016]. The approximate cloak and the invisibility estimate is independent of the objects being cloaked. Finally, we present analytical as well as numerical evidence for the solvability of the required algebraic equations.