Related papers: Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial

Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial

URL: http://arxiv.org/abs/2111.06145v2
Date: Sat, 19 Mar 2022 12:32:39 GMT
Title: Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial
Authors: Michael Perelshtein, Kirill Petrovnin, Visa Vesterinen, Sina Hamedani Raja, Ilari Lilja, Marco Will, Alexander Savin, Slawomir Simbierowicz, Robab Jabdaraghi, Janne Lehtinen, Leif Gr\"onberg, Juha Hassel, Mika Prunnila, Joonas Govenius, Sorin Paraoanu, Pertti Hakonen
Abstract summary: Entangled microwave photons form a fundamental resource for quantum information processing and sensing. We use a low-loss Josephson metamaterial to generate frequency-entangled photons from vacuum fluctuations at a rate of 2 giga entangled bits per second spanning over 4 GHz bandwidth.
Score: 40.96261204117952
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Entangled microwave photons form a fundamental resource for quantum information processing and sensing with continuous variables. We use a low-loss Josephson metamaterial comprising superconducting, non-linear, asymmetric inductive elements to generate frequency-entangled photons from vacuum fluctuations at a rate of 2 giga entangled bits per second spanning over 4 GHz bandwidth. The device is operated as a traveling wave parametric amplifier under Kerr-relieving biasing conditions. Furthermore, we realize the first successfully demonstration of single-mode squeezing in such devices -- $3.1\pm0.7$\,dB below the zero-point level at half of modulation frequency.

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