Coherent-incoherent transition in a Cooper-pair-box coupled to a quantum oscillator: an equilibrium approach
Mesoscale and Nanoscale Physics
2008-12-11 v1
Abstract
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.
Cite
@article{arxiv.0807.3475,
title = {Coherent-incoherent transition in a Cooper-pair-box coupled to a quantum oscillator: an equilibrium approach},
author = {Ying-Hua Huang and Hang Wong and Zhi-De Chen},
journal= {arXiv preprint arXiv:0807.3475},
year = {2008}
}
Comments
8 pages, 7 figures