Berlin 2015 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 66: Superconductivity: Tunneling, Josephson Junctions, SQUIDs
TT 66.4: Talk
Wednesday, March 18, 2015, 15:45–16:00, H 2053
Displacement of microwave squeezed states with Josephson parametric amplifiers — •Ling Zhong1,2,3, Kirill Fedorov1, Martin Betzenbichler1,2, Stefan Pogorzalek1,2, Alexander Baust1,2,3, Edwar Xie1,2,3, Max Haeberlein1,2, Manuel Schwarz1,2,3, Peter Eder1,2, Jan Goetz1,2, Karl Friedrich Wulschner1,2, Edwin Menzel1, Hans Hübl1,2, Frank Deppe1,2, Achim Marx1, 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), Schellingstraße 4, 80799 München, Germany
Propagating quantum microwaves are promising building blocks for quantum communication. Interestingly, such itinerant quantum microwaves can be generated in the form of squeezed photon states by Josephson parametric amplifiers (JPA). We employ a specific "dual-path" setup for both state reconstruction and JPA characterization. Displacement operations are performed by using a directional coupler after the squeezing. We compare our results with theory predictions. In particular, we discuss our experiments in the context of remote state preparation and quantum teleportation with propagating microwaves.
This work is supported by the DFG via SFB 631 and EU projects CCQED and PROMISCE.