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Nonpropagating string excitations

 

作者: Michael Berry,   John T. Foley,   Greg Gbur,   Emil Wolf,  

 

期刊: American Journal of Physics  （AIP Available online 1998）
卷期: Volume 66, issue 2  

页码: 121-123

 

ISSN:0002-9505

 

年代: 1998

 

DOI:10.1119/1.18829

 

出版商: American Association of Physics Teachers

 

关键词: 03.40;03.50;41.

 

数据来源: AIP

 

摘要:

It is shown that certain force distributions applied to a finite portion of an infinitely long string do not produce any excitation outside the region of the applied force. The existence of such nonpropagating excitations is demonstrated by a simple example, and two general theorems concerning their nature are proven. Some analogies between nonpropagating string excitations and fields produced by nonradiating sources are noted.

 

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