Kvasipartikel: Forskelle mellem versioner

<ref name=Mattuck>[http://books.google.com/books?id=pe-v8zfxE68C&pg=PA10 ''A guide to Feynman diagrams in the many-body problem'', by Richard D. Mattuck, p10]. Citat: "As we have seen, the quasi particle consists of the original real, individual particle, plus a cloud of disturbed neighbors. It behaves very much like an individual particle, except that it has an effective mass and a lifetime. But there also exist other kinds of fictitious particles in many-body systems, i.e. 'collective excitations'. These do not center around individual particles, but instead involve collective, wavelike motion of ''all'' the particles in the system simultaneously."</ref>

 

 

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