Broadband Continuous-Variable Entanglement Generation Using a Kerr-Free Josephson Metamaterial

• DOI: 10.1103/physrevapplied.18.024063
• Publication Date: 2022-08-23T15:54:57Z
• Authors: M.R. Perelshtein; K.V. Petrovnin; V. Vesterinen; S. Hamedani Raja; I. Lilja; M. Will; A. Savin; S. Simbierowicz; R.N. Jabdaraghi; J.S. Lehtinen; L. Grönberg; J. Hassel; M.P. Prunnila; J. Govenius; G.S. Paraoanu; P.J. Hakonen
• Keywords: Photon entanglement; Quantum sensor

Generation of quantum resources like entanglement is pivotal for technology. This work uses superconducting Josephson metamaterials to generate color-entangled photons from vacuum fluctuations at a high rate, showing the presented system be superb microwave generator with remarkable bandwidth. Successful squeezing light also demonstrated. These results are quite promising computing, sensing, and communication devices.