Double-Λ microscopic model for entangled light generation by four-wave mixing
Year: 2010
Authors: Glorieux Q., Dubessy R., Guibal S., Guidoni L., Likforman JP., Coudreau T., Arimondo E.
Autors Affiliation: Univ Paris Diderot, CNRS 10, UMR 7162, Lab Mat & Phenomenes Quant, FR-75013 Paris, France; Univ Pisa, Dipartimento Fis E Fermi, CNR, Ist Nazl Ott, IT-56127 Pisa, Italy.
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.
Journal/Review: PHYSICAL REVIEW A
Volume: 82 (3) Pages from: 33819-1 to: 33819-10
KeyWords: Squeezed States; Quantum-noise; Narrow-band; Nondegenerate; Resonances; CriterionDOI: 10.1103/PhysRevA.82.033819Citations: 75data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-09-15References taken from IsiWeb of Knowledge: (subscribers only)