2011/01/11 by C. Eichler, Christopher Eichler, D. Bozyigit +11 · 2 citations
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Frequency domain #Mathematical analysis #Mathematics #Mechanical and Optical Resonators #Microwave #Mode (computer interface) #Optics #Physics #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #cond-mat.mes-hall #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1103/physrevlett.107.113601
published as Phys. Rev. Lett. 107, 113601 (2011) · 4 pages, 4 figures
arxiv created 2011/01/11 · openalex publication_date 2011/09/06 · arxiv updated 2015/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Continuous variable entanglement between two modes of a radiation field is usually studied at optical frequencies. Here we demonstrate experiments that show the entanglement between microwave photons of different energy in a broadband squeezed beam. We use a Josephson parametric amplifier to generate the two-mode correlated state and detect all four quadrature components simultaneously in a two-channel heterodyne setup using amplitude detectors. Analyzing two-dimensional phase space histograms for all possible pairs of quadratures allows us to determine the full covariance matrix, which is in good agreement with the one expected for a two-mode squeezed state.