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TT: Fachverband Tiefe Temperaturen
TT 42: Quantum Coherence, Quantum Information Systems 2
TT 42.5: Talk
Wednesday, March 13, 2013, 16:00–16:15, H18
Path Entanglement of Continuous-Variable Quantum Microwaves — •E. P. Menzel1, R. Di Candia2, F. Deppe1, P. Eder1, L. Zhong1, M. Ihmig4, M. Haeberlein1, A. Baust1, E. Hoffmann1, D. Ballester3, K. Inomata5, T. Yamamoto5,6, Y. Nakamura5,7, E. Solano2, A. Marx1, and R. Gross1 — 1Walther-Meissner-Institut and TU Muenchen, Germany — 2Universidad del País Vasco UPV/EHU and Ikerbasque, Spain — 3University College London, UK — 4TU Muenchen, Germany — 5RIKEN Advanced Science Institute, Japan — 6NEC Smart Energy Research Laboratories, Japan — 7The University of Tokyo, Japan
Entanglement is a quantum mechanical phenomenon playing a key role in quantum communication and information processing protocols. Here, we report on frequency-degenerate entanglement between continuous-variable quantum microwaves propagating along two separated paths. In our experiment, we combine a squeezed and a vacuum state via a beam splitter. We reconstruct the squeezed state and, independently from this, detect and quantify the produced entanglement via correlation measurements[1]. Our work paves the way towards quantum communication and teleportation with continuous variables in the microwave regime.
This work is supported by DFG via SFB 631, the German Excellence Initiative
via NIM, EU projects SOLID, CCQED and PROMISCE, MEXT Kakenhi “Quantum Cybernetics”, JSPS FIRST
Program, the NICT Commissioned Research, EPSRC EP/H050434/1, Basque Government IT472-10, and Spanish
MICINN FIS2009-12773-C02-01.
[1] E. P. Menzel et al.,arXiv:1210.4413