Transport spectroscopy of singlet-triplet quantum dot states coupled to electronic cavities
arXiv:1612.03850
Abstract
A strong coupling between an electronic cavity and a quantum dot has been recently demonstrated [Phys. Rev. Lett. 115, 166603 (2015)] and described in a comprehensive theoretical framework [Phys. Rev. B 96, 235431 (2017)]. Here, we focus on the signatures that demonstrate the cavity's impact on inelastic singlet-triplet transport through the dot. We find the same transport signatures in the experiment as predicted by the model that describes the coupled dot--cavity system. Interestingly, a lowest-order treatement of the coupling to the electronic leads on top of an exact diagonalisation of the dot-cavity system is sufficient to highlight the interplay between the cavity and the higher-order inelastic singlet-triplet cotunneling.
8 pages, 3 figures, comments welcome
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