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Fedorov KG, Pogorzalek S, Las Heras U, et al. Finite-time quantum entanglement in propagating squeezed microwaves. Sci Rep. 2018;8(1):6416doi: 10.1038/s41598-018-24742-z.
Fedorov, K. G., Pogorzalek, S., Las Heras, U., Sanz, M., Yard, P., Eder, P., Fischer, M., Goetz, J., Xie, E., Inomata, K., Nakamura, Y., Di Candia, R., Solano, E., Marx, A., Deppe, F., & Gross, R. (2018). Finite-time quantum entanglement in propagating squeezed microwaves. Scientific reports, 8(1), 6416. https://doi.org/10.1038/s41598-018-24742-z
Fedorov, K G, et al. "Finite-time quantum entanglement in propagating squeezed microwaves." Scientific reports vol. 8,1 (2018): 6416. doi: https://doi.org/10.1038/s41598-018-24742-z
Fedorov KG, Pogorzalek S, Las Heras U, Sanz M, Yard P, Eder P, Fischer M, Goetz J, Xie E, Inomata K, Nakamura Y, Di Candia R, Solano E, Marx A, Deppe F, Gross R. Finite-time quantum entanglement in propagating squeezed microwaves. Sci Rep. 2018 Apr 23;8(1):6416. doi: 10.1038/s41598-018-24742-z. PMID: 29686396; PMCID: PMC5913304.
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Sci Rep. 2018 Apr 23;8(1):6416. doi: 10.1038/s41598-018-24742-z.

Finite-time quantum entanglement in propagating squeezed microwaves.

Scientific reports

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

Affiliations

  1. Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, D-85748, Garching, Germany. [email protected].
  2. Physik-Department, Technische Universität München, D-85748, Garching, Germany. [email protected].
  3. Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, D-85748, Garching, Germany.
  4. Physik-Department, Technische Universität München, D-85748, Garching, Germany.
  5. Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, E-48080, Bilbao, Spain.
  6. Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799, München, Germany.
  7. RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan.
  8. National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan.
  9. Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo, 153-8904, Japan.
  10. Freie Universität Berlin, Institut für Theoretische Physik, Arnimallee 14, 14195, Berlin, Germany.
  11. IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013, Bilbao, Spain.
  12. Department of Physics, Shanghai University, 200444, Shanghai, China.
  13. Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, D-85748, Garching, Germany. [email protected].
  14. Physik-Department, Technische Universität München, D-85748, Garching, Germany. [email protected].
  15. Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799, München, Germany. [email protected].

PMID: 29686396 PMCID: PMC5913304 DOI: 10.1038/s41598-018-24742-z

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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