2014/10/24 by Polina R. Sharapova, A. M. Pérez, Angela M. Perez +3 · 3 citations
Computer Science · Mathematics · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Mathematics #Mixing (physics) #Multi-mode optical fiber #Optics #Parametric statistics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum correlation #Quantum discord #Quantum entanglement #Quantum mechanics #Quantum optics #Quantum optics and atomic interactions #Spontaneous parametric down-conversion #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physreva.91.043816
5 pages, 4 figures
arxiv created 2014/10/24 · openalex publication_date 2015/04/10 · arxiv updated 2016/03/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate both theoretically and experimentally strong correlations in macroscopic (bright) quantum states of light generated via unseeded parametric down-conversion and four-wave mixing. The states generated this way contain only quantum noise, without a classical component, and are referred to as bright squeezed vacuum (BSV). Their important advantage is the multimode structure, which offers a larger capacity for the encoding of quantum information. For the theoretical description of these states and their correlation features we introduce a generalized fully analytical approach, based on the concept of independent collective (Schmidt) modes and valid for the cases of both weak and strong nonlinear interaction. In experiment, we generate states of macroscopic BSV with up to 1010 photons per mode and examine large photon-number spatial correlations that are found to be very well described by our theoretical approach.