%0 Journal Article
%T Coherent-incoherent transition in a Cooper-pair-box coupled to a quantum oscillator: an equilibrium approach
%A Ying-Hua Huang
%A Hang Wong
%A Zhi-De Chen
%J The Open Condensed Matter Physics Journal
%D 2008
%I 
%R 10.2174/1874186X00801010019]
%X Temperature effect on quantum tunneling in a Cooper-pair-box coupled to a quantum oscillator is studied by both numerical and analytical calculations. It is found that, in strong coupling regions, coherent tunneling of a Cooper-pair-box can be destroyed by its coupling to a quantum oscillator and the tunneling becomes thermally activated as the temperature rises, leading to failure of the Cooper-pair-box. The transition temperature between the coherent tunneling and thermo-activated hopping is determined and physics analysis based on small polaron theory is also provided.
%U http://www.benthamscience.com/open/tocmpj/articles/V001/19TOCMPJ.htm