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Invisibility carpet in a channel with a structured fluid

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arxiv 1109.6739 v1 pith:IM63UYYE submitted 2011-09-30 physics.flu-dyn

Invisibility carpet in a channel with a structured fluid

classification physics.flu-dyn
keywords carpetchanneldifferentdomainsinvisibilitylinearoperatorsproperty
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We first note it is possible to construct two linear operators defined on two different domains, yet sharing the same spectrum using a geometric transform. However, one of these two operators will necessarily have spatially varying, matrix valued, coefficients. This mathematical property can be used in the design of metamaterials whereby two different domains behave in the same electromagnetic, acoustic, or hydrodynamic way (mimetism). To illustrate this property, we describe a feasible invisibility carpet for linear surface liquid waves in a channel. This structured metamaterial bends surface waves over a finite interval of Hertz frequencies.

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