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Quantum imaging with a small number of transverse modes

Abstract : Spatial multi-mode quantum optics, also termed « quantum imaging », allows a study of the detection of any physical parameter within an optical image. The parameter considered here can for instance be the transverse displacement or the tilt of a laser beam, or even the bit sequence of an optical disc encoded onto the beam.
Such measurements are ultimately limited by the quantum nature of optical images. We show that the use of non classical beams allows a reduction of the measurement fluctuations below the latter fundamental limit.
Using this theoretical result, we have performed optimal measurements of laser beam nano-displacement, as well as entanglement between this quantity and its conjugate variable : beam tilt. The implementation of these experiments has led us to demonstrate all the key elements required for quantum imaging experiments.
We have also investigated the possibility of using multi-mode light as parallel communication channels for quantum information.
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Contributor : Vincent Delaubert <>
Submitted on : Tuesday, May 15, 2007 - 2:41:20 PM
Last modification on : Thursday, December 10, 2020 - 12:38:10 PM
Long-term archiving on: : Wednesday, April 7, 2010 - 3:37:15 AM


  • HAL Id : tel-00146849, version 1


Vincent Delaubert. Quantum imaging with a small number of transverse modes. Atomic Physics [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2007. English. ⟨tel-00146849⟩



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