Abstract
A recent experimental breakthrough has enabled probing the electronic parametric resonance of a single magnetic atom in a scanning tunneling microscopy setup. The results present intriguing features, such as an asymmetric line shape and an unusually large ratio of the decoherence and decay rates, which defy standard approaches using the conventional Bloch equations. To address these issues we employ generalized Bloch equations, together with proper microscopic modeling of the magnetic adatom, and show how all the experimental features can be naturally accounted for. The proposed approach may also be useful in treating any future similar experiments, as well as next generation hybrid quantum devices.
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