Generation and Structuring of Multipartite Entanglement in a Josephson Parametric System

Kirill Viktorovich Petrovnin; Michael Romanovich Perelshtein; Tero Korkalainen; Visa Vesterinen; Ilari Lilja; Gheorghe Sorin Paraoanu; Pertti Juhani Hakonen

doi:10.1002/qute.202200031

Generation and Structuring of Multipartite Entanglement in a Josephson Parametric System

Kirill Viktorovich Petrovnin (Corresponding Author), Michael Romanovich Perelshtein, Tero Korkalainen, Visa Vesterinen, Ilari Lilja, Gheorghe Sorin Paraoanu, Pertti Juhani Hakonen

BA6208 Quantum computing hardware

Aalto University

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

4 Citations (Scopus)

Abstract

Quantum correlations are a vital resource in advanced information processing based on quantum phenomena. Remarkably, the vacuum state of a quantum field may act as a key element for the generation of multipartite quantum entanglement. In this work, generation of genuine tripartite entangled state and its control is achieved by the use of the phase difference between two continuous pump tones. Control of the subspaces of the covariance matrix for tripartite bisqueezed state is demonstrated. Furthermore, by optimizing the phase relationships in a three-tone pumping scheme genuine quadripartite entanglement of a generalized H-graph state ((Formula presented.) -graph) is explored. This scheme provides a comprehensive control toolbox for the entanglement structure and allows to demonstrate, for first time to the authors' knowledge, genuine quadripartite entanglement of microwave modes. All experimental results are verified with numerical simulations of the nonlinear quantum Langevin equation. It is envisioned that quantum resources facilitated by multi-pump configurations offer enhanced prospects for quantum data processing using parametric microwave cavities.

Original language	English
Article number	2200031
Number of pages	19
Journal	Advanced Quantum Technologies
Volume	6
Issue number	1
DOIs	https://doi.org/10.1002/qute.202200031
Publication status	Published - 2023
MoE publication type	A1 Journal article-refereed

Funding

The authors thank Mark Dykman, Stefano Pirandola, Olivier Pfister, Aidar Sultanov, Shruti Dogra, and Marko Kuzmanovié for fruitful discussions and useful comments. This work was supported by the Academy of Finland through the Finnish Center of Excellence in Quantum Technology QTF (projects 312295, 312296, 336810, 336813). This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 862644 (FET‐Open project QUARTET) and grant agreement no. 824109 (European Microkelvin Platform), as well as ERC grant agreement no. 670743 (QuDeT). G.S.P and K.V.P. also would like to thank Saab for support, under a research agreement between Saab and Aalto University. The work of PJH and IL was supported by MATINE grant VN/13774/2020‐PLM‐49.

Keywords

continuous variables
Josephson parametric amplifier
microwaves
multipartite entanglement
quantum correlations
quantum entanglement

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10.1002/qute.202200031Licence: CC BY

Cite this

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title = "Generation and Structuring of Multipartite Entanglement in a Josephson Parametric System",

abstract = "Quantum correlations are a vital resource in advanced information processing based on quantum phenomena. Remarkably, the vacuum state of a quantum field may act as a key element for the generation of multipartite quantum entanglement. In this work, generation of genuine tripartite entangled state and its control is achieved by the use of the phase difference between two continuous pump tones. Control of the subspaces of the covariance matrix for tripartite bisqueezed state is demonstrated. Furthermore, by optimizing the phase relationships in a three-tone pumping scheme genuine quadripartite entanglement of a generalized H-graph state ((Formula presented.) -graph) is explored. This scheme provides a comprehensive control toolbox for the entanglement structure and allows to demonstrate, for first time to the authors' knowledge, genuine quadripartite entanglement of microwave modes. All experimental results are verified with numerical simulations of the nonlinear quantum Langevin equation. It is envisioned that quantum resources facilitated by multi-pump configurations offer enhanced prospects for quantum data processing using parametric microwave cavities.",

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author = "Petrovnin, {Kirill Viktorovich} and Perelshtein, {Michael Romanovich} and Tero Korkalainen and Visa Vesterinen and Ilari Lilja and Paraoanu, {Gheorghe Sorin} and Hakonen, {Pertti Juhani}",

note = "Funding Information: The authors thank Mark Dykman, Stefano Pirandola, Olivier Pfister, Aidar Sultanov, Shruti Dogra, and Marko Kuzmanovi{\'e} for fruitful discussions and useful comments. This work was supported by the Academy of Finland through the Finnish Center of Excellence in Quantum Technology QTF (projects 312295, 312296, 336810, 336813). This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 862644 (FET‐Open project QUARTET) and grant agreement no. 824109 (European Microkelvin Platform), as well as ERC grant agreement no. 670743 (QuDeT). G.S.P and K.V.P. also would like to thank Saab for support, under a research agreement between Saab and Aalto University. The work of PJH and IL was supported by MATINE grant VN/13774/2020‐PLM‐49. Publisher Copyright: {\textcopyright} 2022 The Authors. Advanced Quantum Technologies published by Wiley-VCH GmbH.",

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AU - Paraoanu, Gheorghe Sorin

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N2 - Quantum correlations are a vital resource in advanced information processing based on quantum phenomena. Remarkably, the vacuum state of a quantum field may act as a key element for the generation of multipartite quantum entanglement. In this work, generation of genuine tripartite entangled state and its control is achieved by the use of the phase difference between two continuous pump tones. Control of the subspaces of the covariance matrix for tripartite bisqueezed state is demonstrated. Furthermore, by optimizing the phase relationships in a three-tone pumping scheme genuine quadripartite entanglement of a generalized H-graph state ((Formula presented.) -graph) is explored. This scheme provides a comprehensive control toolbox for the entanglement structure and allows to demonstrate, for first time to the authors' knowledge, genuine quadripartite entanglement of microwave modes. All experimental results are verified with numerical simulations of the nonlinear quantum Langevin equation. It is envisioned that quantum resources facilitated by multi-pump configurations offer enhanced prospects for quantum data processing using parametric microwave cavities.

AB - Quantum correlations are a vital resource in advanced information processing based on quantum phenomena. Remarkably, the vacuum state of a quantum field may act as a key element for the generation of multipartite quantum entanglement. In this work, generation of genuine tripartite entangled state and its control is achieved by the use of the phase difference between two continuous pump tones. Control of the subspaces of the covariance matrix for tripartite bisqueezed state is demonstrated. Furthermore, by optimizing the phase relationships in a three-tone pumping scheme genuine quadripartite entanglement of a generalized H-graph state ((Formula presented.) -graph) is explored. This scheme provides a comprehensive control toolbox for the entanglement structure and allows to demonstrate, for first time to the authors' knowledge, genuine quadripartite entanglement of microwave modes. All experimental results are verified with numerical simulations of the nonlinear quantum Langevin equation. It is envisioned that quantum resources facilitated by multi-pump configurations offer enhanced prospects for quantum data processing using parametric microwave cavities.

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Generation and Structuring of Multipartite Entanglement in a Josephson Parametric System

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Generation and Structuring of Multipartite Entanglement in a Josephson Parametric System

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