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Mercoledì 22 marzo ore 16:30 seminario prof. Alessandro Ridolfo "Coherent detection of non-perturbative light-matter interaction"

Alessandro Ridolfo

Mercoledì 22 marzo 2023 alle ore 16:30, presso l'Aula Newton del Plesso di Fisica, il Prof. Alessandro Ridolfo, del Departimento di Fisica e Astronomia “Ettore Majorana” della Università degli Studi di Catania, terrà un seminario dal titolo: 

Coherent detection of non-perturbative light-matter interaction


Hybrid quantum systems in the ultrastrong, and even more in the deep-strong, coupling
regimes can exhibit exotic physical phenomena and promise new applications in quantum
technologies. In these non-perturbative regimes, a qubit–resonator system has an
entangled quantum vacuum with a nonzero average photon number in the resonator, where
the photons are virtual and cannot be directly detected. However, the vacuum field is able to
induce the symmetry breaking of a dispersively coupled probe qubit. Here we show, by
exploiting an input/output theory well designed for a coherent probe source, the
spectroscopical evidences of such a symmetry breaking of the selection rules. Furthermore,
for a very weak coherent probe, we also show that the method herein exploited can bring
semi-analytical formulas, very useful for a clear understanding of the physics behind the
observed effects.


Organizzatore: prof. Sandro Wimberger


Pubblicato Martedì, 7 Marzo, 2023 - 14:35 | ultima modifica Martedì, 7 Marzo, 2023 - 16:10