Title 



Quantum statistics for a finite number of polarons in a neutralizing background


Author 





Abstract 



The groundstate energy of an Npolaron system, confined to a spherical quantum dot with a neutralizing background charge, is investigated within an allcoupling manybody pathintegral variational principle, taking into account both the Fermi statistics of the polarons and the electronelectron interaction. The treatment of the groundstate energy is performed for both closedshell and openshell systems. The average fermion density in the neutral spherical dot is characterized by the WignerSeitz parameter r(s). For a sufficiently large but finite number of polarons, the dependence of the groundstate energy on r(s) is very similar to that for a polaron gas in bulk. Hence, we can conclude that the groundstate properties of a polaron gas in bulk can be qualitatively described using a model of a finite number of polarons in a confinement potential provided by a neutralizing background charge.  

Language 



English


Source (journal) 



Journal of physics : condensed matter.  London 

Publication 



London : 2007


ISSN 



09538984


Volume/pages 



19:25(2007), p. 255206,1255206,8


Article Reference 



255206


ISI 



000247074800009


Medium 



Eonly publicatie


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