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DOE OSTI · 21450640

Double-{Lambda} microscopic model for entangled light generation by four-wave mixing

Glorieux, Q·Dubessy, R·Guibal, S·Guidoni, L·Likforman, J -P·Coudreau, T·Arimondo, E
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Abstract

Motivated by recent experiments, we study four-wave-mixing in an atomic double-{Lambda} 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 conjugate beams beyond the linear amplifier approximation. A continuous-variable approach gives us access to relative-intensity noise spectra that can be directly compared with 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-atom sample.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS74 ATOMIC AND MOLECULAR PHYSICSAMPLIFIERSAPPROXIMATIONSATOMSBEAMSCALCULATION METHODSELECTROMAGNETIC RADIATIONELECTRONIC EQUIPMENTENERGY SPECTRAEQUIPMENTFREQUENCY MIXINGNOISEPHOTON BEAMSPUMPINGQUANTUM ENTANGLEMENTRADIATIONSSPECTRAVISIBLE RADIATION

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Glorieux, Q, Dubessy, R, Guibal, S, Guidoni, L, Likforman, J -P, Coudreau, T, Arimondo, E. 2010-09-15. Double-{Lambda} microscopic model for entangled light generation by four-wave mixing. https://doi.org/10.1103/physreva.82.033819

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