Year: 2018
Type: article
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.
Source: Scientific Reports
Authors: 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
Institutions: Bavarian Academy of Sciences and Humanities, Walther Meissner Institute, Technical University of Munich, University of the Basque Country, Nanosystems Initiative Munich, RIKEN Center for Emergent Matter Science, National Institute of Advanced Industrial Science and Technology, The University of Tokyo, Freie Universität Berlin, Ikerbasque, Shanghai University
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
Funders: National Institute of Advanced Industrial Science and Technology, Euskal Herriko Unibertsitatea, Ikerbasque, Basque Foundation for Science, University of Tokyo, Technische Universität München, Bayerische Akademie der Wissenschaften, Freie Universität Berlin, Walther-Meißner-Institut, Japan Society for the Promotion of Science, RIKEN
OpenAlex ID: W2735930956