- Tytuł:
- Chaotic Time-Reversed Acoustics: Sensitivity οf the Loschmidt Echo to Perturbations
- Autorzy:
-
Taddese, B.
Johnson, M.
Hart, J.
Antonsen, T.
Ott, E.
Anlage, S. - Powiązania:
- https://bibliotekanauki.pl/articles/1585110.pdf
- Data publikacji:
- 2009-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
03.55.Kk
05.45.Mt
43.58.+z
43.60.+d - Opis:
- 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.
- Źródło:
-
Acta Physica Polonica A; 2009, 116, 5; 729-732
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł