2011/11/14 by Quentin Glorieux, L. Guidoni, Luca Guidoni +6 · 77 citations
Computer Science · Physics and Astronomy · #Atomic physics #Beam (structure) #Beam splitter #Four-wave mixing #Laser #Materials science #Measure (data warehouse) #Mixing (physics) #Nonlinear optics #Open quantum system #Optics #Photon #Photonics #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum imaging #Quantum limit #Quantum mechanics #Quantum optics #Quantum optics and atomic interactions #Quantum state #Quantum technology #Rubidium #quant-ph
paper · pdf · doi:10.1103/physreva.84.053826
published in Physical Review A 84(5) (American Physical Society) · 5 pages, 4 figures; http://link.aps.org/doi/10.1103/PhysRevA.84.053826
openalex publication_date 2011/11/14 · arxiv created 2011/11/17 · arxiv updated 2011/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the generation of intensity quantum correlations using four-wave mixing in a rubidium vapor. The absence of cavities in these experiments allows to deal with several spatial modes simultaneously. In the standard amplifying configuration, we measure relative intensity squeezing up to 9.2 dB below the standard quantum limit. We also theoretically identify and experimentally demonstrate an original regime where, despite no overall amplification, quantum correlations are generated. In this regime, a four-wave mixing setup can play the role of a photonic beam splitter with nonclassical properties, that is, a device that splits a coherent state input into two quantum-correlated beams.