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2009 | 116 | 5 | 729-732
Article title

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

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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
Publisher

Year
Volume
116
Issue
5
Pages
729-732
Physical description
Dates
published
2009-11
Contributors
author
  • 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
  • Department of Physics, University of California, Santa Barbara, CA 93106, USA
author
  • 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
  • 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
  • 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
  • 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
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv116n501kz
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