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SEMINAIRE IPCMS
Quantum optics in the transverse dimension :
ironing out the "quantum roughness" of an image
Vincent BOYER
University of Birmingham - Edgbaston – Royaumes Unis
Vendredi 7 décembre à 11h
Auditorium de l’IPCMS
Owing to the Heisenberg uncertainty principle, light is subject to unavoidable fluctuations in
its phase and amplitude. Quantum opticians have learned how to reduce these fluctuations by
squeezing the light, effectively shifting the quantum noise from one quadrature (e.g. the
amplitude) to the other one (e.g. the phase). Reducing the amplitude quantum noise
corresponds to temporally ordering the photons inside the beam.
In recent years, the advent of efficient four-wave mixing in atomic vapours has made it
possible to manipulate the quantum fluctuations not only in the temporal dimension but also
in the spatial dimensions. A striking realisation has been the production of "entangled images",
that is to say beams of light which are entangled "point per point" across their transverse
profiles. I will review these advances and will present our latest efforts to produce a beam of
light which is amplitude-squeezed at any point of its transverse profile. This corresponds to
transversally ordering the photons inside the beam, effectively reducing the "quantum
roughness" of the beam profile.
The introduction of the spatial degrees of freedom in quantum optics lets us envision novel
applications for quantum light, for example the improvement of optical super-resolution
beyond the standard quantum limit.
Pour rencontrer le conférencier veuillez prendre contact avec Jean-Yves Bigot
mél : bigot@ unistra.fr