Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 99: Poster Session: Transport
TT 99.34: Poster
Donnerstag, 15. März 2018, 15:00–19:00, Poster B
Investigation and application of propagating two-mode squeezed microwaves — •Minxing Xu1,2, K. G. Fedorov1,2, S. Pogorzalek1,2, B. Ghaffari1,2, P. Eder1,2,3, M. Fischer1,2,3, E. Xie1,2,3, A. Marx1, F. Deppe1,2,3, and R. 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
Josephson parametric amplifiers (JPAs) can be employed for the generation of itinerant quantum signals in the form of propagating two-mode squeezed (TMS) states, which are essential for quantum communication and sensing protocols with superconducting quantum circuits. In our work, we employ two flux-driven JPAs at the inputs of an entangling hybrid ring in order to generate two-mode squeezing between the hybrid ring outputs and investigate the resulting TMS states. In particular, we study the robustness of quantum entanglement and other nonclassical correlations, such as quantum discord, in the TMS states to external noise. Finally, we experimentally implement a remote state preparation protocol with an analog feed-forward using propagating squeezed states and determine detrimental effects of losses and noise on the protocol based on a theoretical model.
The authors acknowledge support from DFG through FE 1564/1-1.