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

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*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)
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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, nonlinear, asymmetric inductive elements to generate frequency-entangled photons from vacuum fluctuations at a rate of 2 giga entangled bits per second spanning over the 4-GHz bandwidth. The device is operated as a traveling-wave parametric amplifier under Kerr-relieving biasing conditions. Furthermore, we demonstrate single-mode squeezing in such devices - 3.1±0.7dB below the zero-point level at half of modulation frequency.

Original languageEnglish
Article number024063
Pages (from-to)1-14
Number of pages14
JournalPhysical Review Applied
Volume18
Issue number2
DOIs
Publication statusPublished - 23 Aug 2022
MoE publication typeA1 Journal article-refereed

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  • QUARTET: Quantum readout techniques and technologies

    Paraoanu, G.-S. (Principal investigator)

    15/10/201930/04/2023

    Project: EU: Framework programmes funding

  • -: EMP

    01/01/201931/12/2024

    Project: EU H2020 Framework program

  • QMiCS: Quantum Microwave Communication and Sensing

    Möttönen, M. (Principal investigator)

    01/10/201831/03/2022

    Project: EU: Framework programmes funding

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