A spacetime cloak, or a history editor

McCall, MW, Favaro, A, Kinsler, P and Boardman, AD 2010, 'A spacetime cloak, or a history editor' , Journal of Optics, 13 (2) , 024003.

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We introduce a new type of electromagnetic cloak, the spacetime cloak (STC), which conceals events rather than objects. Non-emitting events occurring during a restricted period are never suspected by a distant observer. The cloak works by locally manipulating the speed of light of an initially uniform light distribution, whilst the light rays themselves always follow straight paths. Any ‘perfect’ spacetime cloak would necessarily rely upon the technology of electromagnetic metamaterials, which has already been shown to be capable of deforming light in ways hitherto unforeseen—to produce, for example, an electromagnetic object cloak. Nevertheless, we show how it is possible to use intensity-dependent refractive indices to construct an approximate STC, an implementation that would enable the distinct signature of successful event cloaking to be observed. Potential demonstrations include systems that apparently violate quantum statistics, ‘interrupt-without-interrupt’ computation on convergent data channels and the illusion of a Star Trek transporter.

Item Type: Article
Themes: Subjects outside of the University Themes
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre
Journal or Publication Title: Journal of Optics
Publisher: European Optical Society
Refereed: Yes
ISSN: 2040-8978
Depositing User: Users 29196 not found.
Date Deposited: 18 Jul 2012 09:08
Last Modified: 16 Feb 2022 14:22
URI: http://usir.salford.ac.uk/id/eprint/23024

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