Path entanglement of continuous-variable quantum microwaves

E.P. Menzel, R. Di Candia, F. Deppe, P. Eder, L. Zhong, M. Ihmig, M. Haeberlein, A. Baust, E. Hoffmann, D. Ballester, K. Inomata, T. Yamamoto, Y. Nakamura, Enrique Solano, A. Marx, R. Gross

Research output: Contribution to journalArticleScientificpeer-review

140 Citations (Scopus)

Abstract

Path entanglement constitutes an essential resource in quantum information and communication protocols. Here, we demonstrate frequency-degenerate entanglement between continuous-variable quantum microwaves propagating along two spatially separated paths. We combine a squeezed and a vacuum state using a microwave beam splitter. Via correlation measurements, we detect and quantify the path entanglement contained in the beam splitter output state. Our experiments open the avenue to quantum teleportation, quantum communication, or quantum radar with continuous variables at microwave frequencies.
Original languageEnglish
Number of pages4
JournalPhysical Review Letters
Volume109
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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