3 years ago

Transport spectroscopy of singlet-triplet quantum dot states coupled to electronic cavities.

Gianni Blatter, Clemens Rössler, Klaus Ensslin, Michael Sven Ferguson, Oded Zilberberg, Thomas Ihn

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.

Publisher URL: http://arxiv.org/abs/1612.03850

DOI: arXiv:1612.03850v2

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