Considerations on undistorted-progressive X-Waves and davydov solitons, Fröhlich-Bose-Einstein condensation, and Cherenkov-like effect in biosystems
Fuente:
Redalyc
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | Artículo científico |
| Lenguaje: | en |
| Publicado: |
Sociedade Brasileira de Física
2004
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1876482601284272128 |
|---|---|
| author | Áurea R. Vasconcellos |
| author_facet | Áurea R. Vasconcellos |
| contents | Considerations on undistorted-progressive X-Waves and davydov solitons, Fröhlich-Bose-Einstein condensation, and Cherenkov-like effect in biosystems Áurea R. Vasconcellos Roberto Luzzi Marcus V. Mesquita Física, Astronomía y Matemáticas Research in ultrasonography has evidenced the propagation of a peculiar kind of excitation in fluids. Suchexcitation, dubbed a X-wave, has characteristics resembling that of a solitary-wave type. We reconsider theproblem in a medium consisting of a biological material of the like of ®-helix proteins. It can be shown thatin this case is expected an excitation of the Davydov´s solitary wave type, however strongly damped in normalconditions. The case of acetanilide, an organic polymer which resembles biopolymers, is considered, andthe infrared spectrum analyzed. Davydov´s soliton is evidenced as a coherent state of polar vibrations. Thecase of acoustic (sound) vibrations is also considered, where, also, a damped Davydov-like solitary wave maybe excited. However, it is shown that when traveling in conditions sufficiently away from equilibrium, moreprecisely, when the soliton is embeded in the resulting Fr¨ohlich-Bose-Einstein condensate, the lifetime of thesolitary wave is largely enhanced. Moreover, a soliton moving in bulk with a velocity larger than that of thegroup velocity of the normal vibrational waves would produce a Cherenkov-like emission of phonons givingrise to the observed X-wave-like pattern. This paper is a modified and extended version of an earlier publicationon the subject. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434227 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.34 |
| format | Artículo científico |
| id | redalyc_46434227 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Considerations on undistorted-progressive X-Waves and davydov solitons, Fröhlich-Bose-Einstein condensation, and Cherenkov-like effect in biosystems Áurea R. Vasconcellos Física, Astronomía y Matemáticas Considerations on undistorted-progressive X-Waves and davydov solitons, Fröhlich-Bose-Einstein condensation, and Cherenkov-like effect in biosystems Áurea R. Vasconcellos Roberto Luzzi Marcus V. Mesquita Física, Astronomía y Matemáticas Research in ultrasonography has evidenced the propagation of a peculiar kind of excitation in fluids. Suchexcitation, dubbed a X-wave, has characteristics resembling that of a solitary-wave type. We reconsider theproblem in a medium consisting of a biological material of the like of ®-helix proteins. It can be shown thatin this case is expected an excitation of the Davydov´s solitary wave type, however strongly damped in normalconditions. The case of acetanilide, an organic polymer which resembles biopolymers, is considered, andthe infrared spectrum analyzed. Davydov´s soliton is evidenced as a coherent state of polar vibrations. Thecase of acoustic (sound) vibrations is also considered, where, also, a damped Davydov-like solitary wave maybe excited. However, it is shown that when traveling in conditions sufficiently away from equilibrium, moreprecisely, when the soliton is embeded in the resulting Fr¨ohlich-Bose-Einstein condensate, the lifetime of thesolitary wave is largely enhanced. Moreover, a soliton moving in bulk with a velocity larger than that of thegroup velocity of the normal vibrational waves would produce a Cherenkov-like emission of phonons givingrise to the observed X-wave-like pattern. This paper is a modified and extended version of an earlier publicationon the subject. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434227 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.34 |
| title | Considerations on undistorted-progressive X-Waves and davydov solitons, Fröhlich-Bose-Einstein condensation, and Cherenkov-like effect in biosystems |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434227 |