The Aharonov-Bohm Effect Revisited by an Acoustic Time-Reversal Mirror

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Abstract
We take advantage of the violation of time-reversal invariance for acoustic waves to achieve a new way of characterizing a vorticity field with a double time-reversal mirror (TRM). In particular, we show experimentally that the double TRM works as a vorticity amplifier. In the case of a vorticity filament, the sound-vorticity interaction is interpreted as the acoustical analog of the Aharonov-Bohm effect. Numerical experiments simulate the acoustical Aharonov-Bohm effect by propagating a plane wave which is scattered by a heterogeneous motionless medium.