Chaotic Time-Reversed Acoustics: Sensitivity οf the Loschmidt Echo to Perturbations

• Authors: B. Taddese , M. Johnson , J. Hart , T. Antonsen , E. Ott , S. Anlage
• Languages of publication: EN

Abstracts

EN

We experimentally demonstrate a new acoustic sensor based on the concept of quantum mechanical scattering fidelity and the Loschmidt echo applied to classical acoustic waves in air. The sensor employs a one-recording-channel time-reversal mirror that exploits spatial reciprocity to sensitively measure the classical analog of the scattering fidelity of an enclosed region. The experiments are carried out in a stairwell using a simple speaker and microphone. The input is a 7.0 kHz signal that is amplitude modulated with a 1 ms long pulse. We examine the sensitivity of the time-reversed reconstructed pulse to phase noise, long term drift, and to typical perturbations caused by the rotation of an object in the scattering environment.

Keywords

EN

03.55.Kk; 05.45.Mt; 43.58.+z; 43.60.+d

Discipline

• 43.58.+z: Acoustical measurements and instrumentation
• 43.60.+d: Acoustic signal processing
• 05.45.Mt: Quantum chaos; semiclassical methods

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 5
• Pages: 729-732

Dates

published

2009-11

Contributors

author

B. Taddese

• Center for Nanophysics and Advanced Materials, Physics Department, University of Maryland, College Park, MD 20742-4111, USA
• Physics Department, University of Maryland, College Park, MD 20742-4111, USA
• Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA

author

M. Johnson

• Department of Physics, University of California, Santa Barbara, CA 93106, USA

author

J. Hart

• Physics Department, University of Maryland, College Park, MD 20742-4111, USA
• Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742-3511, USA

author

T. Antonsen

• Physics Department, University of Maryland, College Park, MD 20742-4111, USA
• Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA
• Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742-3511, USA

author

E. Ott

• Physics Department, University of Maryland, College Park, MD 20742-4111, USA
• Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA
• Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742-3511, USA

author

S. Anlage

• Center for Nanophysics and Advanced Materials, Physics Department, University of Maryland, College Park, MD 20742-4111, USA
• Physics Department, University of Maryland, College Park, MD 20742-4111, USA
• Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA

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Identifiers

DOI

10.12693/APhysPolA.116.729