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Article Dans Une Revue Physical Review Letters Année : 2005

Weak Localization and Time Reversal of Ultrasound in a Rotational Flow

Julien de Rosny
Arnaud Tourin
Arnaud Derode
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Philippe Roux
Mathias Fink
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Résumé

A one-channel time-reversal (TR) experiment is performed inside a rough reverberating cavity in the presence of a rotational flow. The amplitude of the TR wave is plotted versus the distance between the TR channel and the initial source: when they coincide, it exhibits a "time-reversal enhancement" (TRE). With no flow, the TRE is the same as the coherent backscattering enhancement (CBE). But contrary to CBE, the TRE peak is shown to be insensitive to the breaking down of reciprocity due to the flow. This new effect of weak localization is sustained by a diagrammatic approach.
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Dates et versions

hal-00018725 , version 1 (08-02-2006)

Identifiants

Citer

Julien de Rosny, Arnaud Tourin, Arnaud Derode, Philippe Roux, Mathias Fink. Weak Localization and Time Reversal of Ultrasound in a Rotational Flow. Physical Review Letters, 2005, 95, pp.074301. ⟨10.1103/PhysRevLett.95.074301⟩. ⟨hal-00018725⟩
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