Sensor Based on Extending the Concept of Fidelity to Classical Waves

Details Sensor Based on Extending the Concept of Fidelity to Classical Waves Sensor Based on Extending the Concept of Fidelity to Classical Waves

2008-12-05

arxiv.org/abs/0812.1118v4

Appl. Phys. Lett. 95, 114103 (2009)

Nonlinear Sciences

Chaotic Dynamics

4 pages, 2 figures

Scientific paper

10.1063/1.3232214

We propose and demonstrate a remote sensor scheme by applying the quantum mechanical concept of fidelity loss to classical waves. The sensor makes explicit use of time-reversal invariance and spatial reciprocity in a wave chaotic system to sensitively and remotely measure the presence of small perturbations. The loss of fidelity is measured through a classical wave-analog of the Loschmidt echo by employing a single-channel time-reversal mirror to rebroadcast a probe signal into the perturbed system. We also introduce the use of exponential amplification of the probe signal to partially overcome the effects of propagation losses and to vary the sensitivity.

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