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Pré-Publication, Document De Travail Année : 2010

Double-lambda microscopic model for entangled light generation by four-wave-mixing

Résumé

Motivated by recent experiments, we study four-wave-mixing in an atomic double–Λ system driven by a far-detuned pump. Using the Heisenberg-Langevin formalism, and based on the microscopic properties of the medium, we calculate the classical and quantum properties of seed and conju- gate beams beyond the linear amplifier approximation. A continuous variable approach gives us access to relative-intensity noise spectra that can be directly compared to experiments. Restricting ourselves to the cold-atom regime, we predict the generation of quantum-correlated beams with a relative-intensity noise spectrum well below the standard quantum limit (down to -6 dB). Moreover entanglement between seed and conjugate beams measured by an inseparability down to 0.25 is expected. This work opens the way to the generation of entangled beams by four-wave mixing in a cold atomic sample.
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Dates et versions

hal-00499509 , version 1 (09-07-2010)

Identifiants

  • HAL Id : hal-00499509 , version 1

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Quentin Glorieux, Romain Dubessy, Samuel Guibal, Luca Guidoni, Jean-Pierre Likforman, et al.. Double-lambda microscopic model for entangled light generation by four-wave-mixing. 2010. ⟨hal-00499509⟩
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