Analogue transformations in physics and their application to acoustics.

Analogue transformations in physics and their application to acoustics.
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物理学的模拟转换及其在声学上的应用。

DOI:
10.1038/srep02009
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Martinez, A.
Martinez, A.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Garcia-Meca, C.;Carloni, S.;Barcelo, C.;Jannes, G.;Sanchez-Dehesa, J.;Martinez, A.

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Transformation optics has shaped up a revolutionary electromagnetic design paradigm, enabling scientists to build astonishing devices such as invisibility cloaks. Unfortunately, the application of transformation techniques to other branches of physics is often constrained by the structure of the field equations. We develop here a complete transformation method using the idea of analogue spacetimes. The method is general and could be considered as a new paradigm for controlling waves in different branches of physics, from acoustics in quantum fluids to graphene electronics. As an application, we derive an “analogue transformation acoustics” formalism that naturally allows the use of transformations mixing space and time or involving moving fluids, both of which were impossible with the standard approach. To demonstrate the power of our method, we give explicit designs of a dynamic compressor, a spacetime cloak for acoustic waves and a carpet cloak for a moving aircraft.
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