Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 45: Transport: Quantum Coherence and Quantum Information Systems - Experiment (jointly with MA, HL)
HL 45.6: Vortrag
Mittwoch, 22. März 2017, 10:45–11:00, HSZ 03
Finite-time correlations of balanced two-mode squeezed microwave states — •Kirill Fedorov1,2, Stefan Pogorzalek1,2, Patrick Yard1,2, Peter Eder1,2,3, Michael Fischer1,2,3, Jan Goetz1,2, Edwar Xie1,2,3, Achim Marx1, Frank Deppe1,2,3, and Rudolf Gross1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, TU München, 85748 Garching, Germany — 3Nanosystems Initiative Munich (NIM), 80799 München, Germany
Generation of balanced two-mode squeezed states is a key task in quantum communication and illumination with continuous variables, as it enables distribution of quantum entanglement between distant parties. For this reason, the investigation of such states is of high interest in the field of propagating quantum microwaves. In our work, we perform tomography of balanced two-mode squeezed microwave states which are created by the means of two flux-driven Josephson parametric amplifiers generating orthogonally squeezed states at the inputs of a 50:50 microwave beam splitter. We study finite-time correlations in order to measure a characteristic time of entanglement decay in quantum channels. Our studies show that quantum communication and illumination protocols with continuous-variable propagating microwaves are experimentally feasible.
The authors acknowledge support from DFG through FE 1564/1-1, the doctorate program ExQM of the Elite Network of Bavaria, and the IMPRS ‘Quantum Science and Technology’.