Superconducting electronic circuits have turned into one of the prime physical systems to investigate quantum optical and atomic physics phenomena in engineered solid state devices. While the on-demand generation and the processing of quantum states on a chip are now routinely achieved with high fidelity, it remains challenging to detect…

I will present our recent work [1], where we study theoretically the low-energy hole states of Ge/Si core/shell nanowires. The low-energy valence band is quasidegenerate, formed by two doublets of different orbital angular momenta, and can be controlled via the relative shell thickness and via external fields. We find that direct (dipolar)…

Advances in high quality optical, electrical, and mechanical systems have led to the observation of quantum coupling between photons and phonons in both the radio frequency and optical domain. This opens up new frontiers, including circuit quantum electrodynamics, ground state cooling of macroscopic mechanical systems, and the coherent…

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