Gravitational Lensing as a Mechanism For Effective Cloaking

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Benjamin K. Tippett
In light of the surge in popularity of electromagnetic cloaking devices, we consider whether it is possible to use general relativity to cloak a volume of spacetime through gravitational lensing. A metric for such a spacetime geometry is presented, and its geometric and physical implications are explained.

The procedure for designing an electromagnetic cloaking device

In general relativity, there is a tradition of engineering spacetime geometries with exotic attributes previously seen only in science fiction. Tipler [11] and Morris [7] have introduced time machines; and Alcubierre [2] introduced a warp drive. In science fiction, one popular conceit is the idea of a cloaking device: a mechanism through which a spaceship could be made undetectable. The revelation that curved spaces can be matched to the electromagnetic properties of a medium has sparked a recent interest in optical cloaking [1, 3–6, 8, 10]. We seek to construct a spacetime geometry which cloaks an interior region from null geodesics….
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Written by physicsgg

August 20, 2011 at 7:14 pm


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