Broadband Continuous-Variable Entanglement Generation Using a Kerr-Free Josephson Metamaterial
Michael Perelshtein, Kirill Petrovnin, Visa Vesterinen, Sina Hamedani Raja, Ilari Lilja, M. Will, Alexander Savin, Slawomir Simbierowicz, Robab Najafi Jabdaraghi, J. S. Lehtinen, Leif Grönberg, Juha Hassel, Mika Prunnila, Joonas Govenius, G. S. Paraoanu, Pertti Hakonen
Abstract
Generation of quantum resources like entanglement is pivotal for quantum technology. This work uses superconducting Josephson metamaterials to generate color-entangled photons from vacuum fluctuations at a high rate, showing the presented system to be a superb microwave entanglement generator with remarkable bandwidth. Successful squeezing of the light is also demonstrated. These results are quite promising for quantum computing, sensing, and communication with superconducting devices.