2006/04/30 by Jietai Jing, Sheng Feng, Russell Bloomer +1 · 89 citations
Computer Science · Mathematics · Physics and Astronomy · #Amplitude #Computer science #Continuous variable #Laser #Mathematical analysis #Mathematics #Mechanical and Optical Resonators #Optical parametric oscillator #Optics #Parametric statistics #Phase (matter) #Phase difference #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quantum optics #Quantum optics and atomic interactions #Stability (learning theory) #Statistics #Variable (mathematics) #quant-ph
paper · pdf · doi:10.1103/physreva.74.041804
published in Physical Review A 74(4) (American Physical Society) · 4 pages, 4 figures, submitted for publication
arxiv created 2006/07/17 · openalex publication_date 2006/10/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We observed continuous-variable entanglement between the bright beams emitted above threshold by an ultrastable optical parametric oscillator (OPO), classically phase locked at a frequency difference of 161.827\phantom\rule0.2em0ex324\phantom\rule0.2em0ex0(5)\phantom\rule0.3em0exMHz. The amplitude-difference squeezing is \ensuremath-3\phantom\rule0.3em0exdB and the phase-sum one is \ensuremath-1.35\phantom\rule0.3em0exdB. Besides proving entanglement in a phase-locked OPO, such outstanding frequency-difference stability paves the way for transferring entanglement between different optical frequencies and densely implementing continuous-variable quantum information in the frequency domain.