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

doi:10.1103/PhysRevApplied.18.024063

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

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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 language	English
Article number	024063
Pages (from-to)	1-14
Number of pages	14
Journal	Physical Review Applied
Volume	18
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevApplied.18.024063
Publication status	Published - 23 Aug 2022
MoE publication type	A1 Journal article-refereed

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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), 1-14. [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 V. Vesterinen and {Hamedani Raja}, S. and I. Lilja and M. Will and A. Savin and S. Simbierowicz and Jabdaraghi, {R. N.} and Lehtinen, {J. S.} and L. Gr{\"o}nberg and J. Hassel and Prunnila, {M. P.} and J. Govenius and Paraoanu, {G. S.} and Hakonen, {P. J.}",

note = "| openaire: EC/H2020/862644/EU//QUARTET | openaire: EC/H2020/820505/EU//QMiCS | openaire: EC/H2020/820363/EU//OpenSuperQ | openaire: EC/H2020/824109/EU//EMP | openaire: EC/H2020/670743/EU//QuDeT Funding Information: 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{\textquoteright}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. Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = aug,

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doi = "10.1103/PhysRevApplied.18.024063",

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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, pp. 1-14. https://doi.org/10.1103/PhysRevApplied.18.024063

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AU - Petrovnin, K. V.

AU - Vesterinen, V.

AU - Hamedani Raja, S.

AU - Lilja, I.

AU - Will, M.

AU - Savin, A.

AU - Simbierowicz, S.

AU - Jabdaraghi, R. N.

AU - Lehtinen, J. S.

AU - Grönberg, L.

AU - Hassel, J.

AU - Prunnila, M. P.

AU - Govenius, J.

AU - Paraoanu, G. S.

AU - Hakonen, P. J.

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JF - Physical Review Applied

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

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QUARTET: Quantum readout techniques and technologies

EMP: European Microkelvin Platform

QMiCS: Quantum Microwave Communication and Sensing

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