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Path Entanglement of Continuous-Variable Quantum Microwaves

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arxiv 1210.4413 v1 pith:7P4SJHTX submitted 2012-10-16 cond-mat.mes-hall cond-mat.supr-conquant-ph

Path Entanglement of Continuous-Variable Quantum Microwaves

classification cond-mat.mes-hall cond-mat.supr-conquant-ph
keywords quantumentanglementpathbeamcommunicationcontinuous-variablemicrowavemicrowaves
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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