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

M. R. Perelshtein; K. V. Petrovnin; Visa Vesterinen; S. Hamedani Raja; I. Lilja; M. Will; A. Savin; Slawomir Simbierowicz; Robab Najafi Jabdaraghi; Janne S. Lehtinen; Leif Grönberg; Juha Hassel; Mika P. Prunnila; Joonas Govenius; G. S. Paraoanu; P. J. Hakonen

doi:10.1103/PhysRevApplied.18.024063

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

M. R. Perelshtein, K. V. Petrovnin, Visa Vesterinen, S. Hamedani Raja, I. Lilja, M. Will, A. Savin, Slawomir Simbierowicz, Robab Najafi Jabdaraghi, Janne S. Lehtinen, Leif Grönberg, Juha Hassel, Mika P. Prunnila, Joonas Govenius, G. S. Paraoanu, P. J. Hakonen (Corresponding Author)

Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

21 Citations (Scopus)

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 language	English
Article number	024063
Journal	Physical Review Applied
Volume	18
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevApplied.18.024063
Publication status	Published - Aug 2022
MoE publication type	A1 Journal article-refereed

Funding

We thank Alpo Ahonen, Paula Holmlund, and Harri Pohjonen for technical assistance and Terra Quantum AG for scientific support. K.V.P. is funded by the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 862644 (FET-Open project: Quantum readout techniques and technologies, QUARTET). The work at VTT is funded from the EU Flagship on Quantum Technology Grant No. H2020-FETFLAG-2018-03 Project Nos. 820363 OpenSuperQ and 820505 QMiCS. The contribution of M.R.P., I.L., M.W., and A.S. is supported by Grant Agreement No. 824109 (European Microkelvin Platform project, EMP), and ERC Grant Agreement No. 670743 (QuDeT). P.J.H. and V.V. acknowledge financial support from the Academy of Finland through Grants No. 314448 and No. 321700, respectively. The work of S.H.R. and P.J.H. is supported by a MATINE research grant. G.S.P. and K.V.P. thank Saab for scientific collaboration under a research agreement with Aalto University. This work is done under the “Finnish Center of Excellence in Quantum Technology QTF” of the Academy of Finland, Projects No. 312059, No. 312294, No. 312295, No. 336810, and No. 312296.

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10.1103/PhysRevApplied.18.024063

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Perelshtein, M. R., Petrovnin, K. V., Vesterinen, V., Hamedani Raja, S., Lilja, I., Will, M., Savin, A., Simbierowicz, S., Jabdaraghi, R. N., Lehtinen, J. S., Grönberg, L., Hassel, J., Prunnila, M. P., Govenius, J., Paraoanu, G. S., & Hakonen, P. J. (2022). Broadband Continuous-Variable Entanglement Generation Using a Kerr-Free Josephson Metamaterial. Physical Review Applied, 18(2), Article 024063. https://doi.org/10.1103/PhysRevApplied.18.024063

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title = "Broadband Continuous-Variable Entanglement Generation Using a Kerr-Free Josephson Metamaterial",

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.",

author = "Perelshtein, {M. R.} and Petrovnin, {K. V.} and Visa Vesterinen and {Hamedani Raja}, S. and I. Lilja and M. Will and A. Savin and Slawomir Simbierowicz and Jabdaraghi, {Robab Najafi} and Lehtinen, {Janne S.} and Leif Gr{\"o}nberg and Juha Hassel and Prunnila, {Mika P.} and Joonas Govenius and Paraoanu, {G. S.} and Hakonen, {P. J.}",

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Perelshtein, MR, Petrovnin, KV, Vesterinen, V, Hamedani Raja, S, Lilja, I, Will, M, Savin, A, Simbierowicz, S, Jabdaraghi, RN, Lehtinen, JS , Grönberg, L, Hassel, J, Prunnila, MP , Govenius, J, Paraoanu, GS & Hakonen, PJ 2022, 'Broadband Continuous-Variable Entanglement Generation Using a Kerr-Free Josephson Metamaterial', Physical Review Applied, vol. 18, no. 2, 024063. https://doi.org/10.1103/PhysRevApplied.18.024063

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AU - Perelshtein, M. R.

AU - Petrovnin, K. V.

AU - Vesterinen, Visa

AU - Hamedani Raja, S.

AU - Lilja, I.

AU - Will, M.

AU - Savin, A.

AU - Simbierowicz, Slawomir

AU - Jabdaraghi, Robab Najafi

AU - Lehtinen, Janne S.

AU - Grönberg, Leif

AU - Hassel, Juha

AU - Prunnila, Mika P.

AU - Govenius, Joonas

AU - Paraoanu, G. S.

AU - Hakonen, P. J.

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

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