A two-level quantum dot driven by an even-pi pulse emits a quantum superposition of its own photon and a scattered laser photon, explaining the observed g(2) ~ 3 bunching without invoking photon-pair emission.
Coherent superposition of emitted and resonantly scattered photons from a two-level system driven by an even-$\pi$ pulse
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abstract
We report the observation of a bunching of ~3 photon states, which is a coherent superposition of emitted photons and resonantly scattered laser photons, arising upon excitation by even-$\pi$ pulses of a two-level system represented by a charged quantum dot in a microcavity. This phenomenon emerges because the exciting laser pulse contains several tens of photons whose quantum amplitude distribution creates such a superposition, and the polarization of the scattered photons is changed by the interaction with the charged resonant system. Such a beam is a high-order member of the Fock space, promising for quantum technologies.
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Coherent superposition of emitted and resonantly scattered photons from a two-level system driven by an even-$\pi$ pulse
A two-level quantum dot driven by an even-pi pulse emits a quantum superposition of its own photon and a scattered laser photon, explaining the observed g(2) ~ 3 bunching without invoking photon-pair emission.