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Full-Bloch beams and ultrafast Rabi-rotating vortices by Dominici, Lorenzo; Colas, David; Gianfrate, Antonio; Rahmani, Amir; Ardizzone, Vincenzo; Ballarini, Dario; De Giorgi, Milena; Gigli, Giuseppe; Laussy, Fabrice P.; Sanvitto, Daniele; Voronova, Nina is a scholarly article available to read on EtoBox.

What is Full-Bloch beams and ultrafast Rabi-rotating vortices about?

Strongly-coupled quantum fields, such as multi-component atomic condensates, optical fields and polaritons, are remarkable systems where the simple dynamics of coupled oscillators can meet the intricate phenomenology of quantum fluids. When the coupling between the components is coherent, not only the particles number, but also their phase texture that maps the linear and angular momentum, can be exchanged. Here, on a system of exciton-polaritons, we have realized a so-called full-Bloch beam: a configuration in which all superpositions of the upper and the lower polariton -- all quantum states of the associated Hilbert space -- are simultaneously present at different points of the physical space, evolving in time according to Rabi-oscillatory dynamics. As a result, the light emitted by the cavity displays a peculiar dynamics of spiraling vortices endowed with oscillating linear and angular momentum and exhibiting ultrafast motion of their cores with striking accelerations to arbitrary speeds. This remarkable vortex motion is shown to result from distortions of the trajectories by a homeomorphic mapping between the Rabi rotation of the full wavefunction on the Bloch sphere and Apoll

Author

Dominici, Lorenzo; Colas, David; Gianfrate, Antonio; Rahmani, Amir; Ardizzone, Vincenzo; Ballarini, Dario; De Giorgi, Milena; Gigli, Giuseppe; Laussy, Fabrice P.; Sanvitto, Daniele; Voronova, Nina

Published

2018

Language

EN