Finite-time quantum entanglement in propagating squeezed microwaves

K.G. Fedorov; S. Pogorzalek; U. Las Heras; M. Sanz; P. Yard; P. Eder; M. Fischer; J. Goetz; E. Xie; K. Inomata; Y. Nakamura; R. Di Candia; E. Solano; A. Marx; F. Deppe; R. Gross

doi:10.1038/s41598-018-24742-z

Finite-time quantum entanglement in propagating squeezed microwaves

K.G. Fedorov, S. Pogorzalek, U. Las Heras, M. Sanz, P. Yard, P. Eder, M. Fischer, J. Goetz, E. Xie, K. Inomata, Y. Nakamura, R. Di Candia, E. Solano, A. Marx, F. Deppe, R. Gross

Not published at Aalto University

Freie Universität Berlin

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

30 Citations (Scopus)

Abstract

Two-mode squeezing is a fascinating example of quantum entanglement manifested in cross-correlations of non-commuting observables between two subsystems. At the same time, these subsystems themselves may contain no quantum signatures in their self-correlations. These properties make two-mode squeezed (TMS) states an ideal resource for applications in quantum communication. Here, we generate propagating microwave TMS states by a beam splitter distributing single mode squeezing emitted from distinct Josephson parametric amplifiers along two output paths. We experimentally study the fundamental dephasing process of quantum cross-correlations in continuous-variable propagating TMS microwave states and accurately describe it with a theory model. In this way, we gain the insight into finite-time entanglement limits and predict high fidelities for benchmark quantum communication protocols such as remote state preparation and quantum teleportation.

Original language	English
Number of pages	6
Journal	Scientific Reports
Volume	8
DOIs	https://doi.org/10.1038/s41598-018-24742-z
Publication status	Published - 2018
MoE publication type	A1 Journal article-refereed

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title = "Finite-time quantum entanglement in propagating squeezed microwaves",

abstract = "Two-mode squeezing is a fascinating example of quantum entanglement manifested in cross-correlations of non-commuting observables between two subsystems. At the same time, these subsystems themselves may contain no quantum signatures in their self-correlations. These properties make two-mode squeezed (TMS) states an ideal resource for applications in quantum communication. Here, we generate propagating microwave TMS states by a beam splitter distributing single mode squeezing emitted from distinct Josephson parametric amplifiers along two output paths. We experimentally study the fundamental dephasing process of quantum cross-correlations in continuous-variable propagating TMS microwave states and accurately describe it with a theory model. In this way, we gain the insight into finite-time entanglement limits and predict high fidelities for benchmark quantum communication protocols such as remote state preparation and quantum teleportation.",

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doi = "10.1038/s41598-018-24742-z",

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T1 - Finite-time quantum entanglement in propagating squeezed microwaves

AU - Fedorov, K.G.

AU - Pogorzalek, S.

AU - Las Heras, U.

AU - Sanz, M.

AU - Yard, P.

AU - Eder, P.

AU - Fischer, M.

AU - Goetz, J.

AU - Xie, E.

AU - Inomata, K.

AU - Nakamura, Y.

AU - Di Candia, R.

AU - Solano, E.

AU - Marx, A.

AU - Deppe, F.

AU - Gross, R.

PY - 2018

Y1 - 2018

N2 - Two-mode squeezing is a fascinating example of quantum entanglement manifested in cross-correlations of non-commuting observables between two subsystems. At the same time, these subsystems themselves may contain no quantum signatures in their self-correlations. These properties make two-mode squeezed (TMS) states an ideal resource for applications in quantum communication. Here, we generate propagating microwave TMS states by a beam splitter distributing single mode squeezing emitted from distinct Josephson parametric amplifiers along two output paths. We experimentally study the fundamental dephasing process of quantum cross-correlations in continuous-variable propagating TMS microwave states and accurately describe it with a theory model. In this way, we gain the insight into finite-time entanglement limits and predict high fidelities for benchmark quantum communication protocols such as remote state preparation and quantum teleportation.

AB - Two-mode squeezing is a fascinating example of quantum entanglement manifested in cross-correlations of non-commuting observables between two subsystems. At the same time, these subsystems themselves may contain no quantum signatures in their self-correlations. These properties make two-mode squeezed (TMS) states an ideal resource for applications in quantum communication. Here, we generate propagating microwave TMS states by a beam splitter distributing single mode squeezing emitted from distinct Josephson parametric amplifiers along two output paths. We experimentally study the fundamental dephasing process of quantum cross-correlations in continuous-variable propagating TMS microwave states and accurately describe it with a theory model. In this way, we gain the insight into finite-time entanglement limits and predict high fidelities for benchmark quantum communication protocols such as remote state preparation and quantum teleportation.

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JO - Scientific Reports

JF - Scientific Reports

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Finite-time quantum entanglement in propagating squeezed microwaves

Abstract

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