Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 105: Focus Session: Mesoscopic Superconductivity and Quantum Circuits

TT 105.2: Hauptvortrag

Freitag, 16. März 2018, 10:00–10:30, H 0104

Quantum Communcation with Propagating Microwaves — •Frank Deppe — Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — Physik-Department, TU München, 85748 Garching, Germany — Nanosystems Initiative Munich (NIM), 80799 München, Germany

Due to the advent of superconducting architectures for quantum information processing, microwave frequencies have become a promising option for quantum communication and illumination. One prominent branch in the resulting line of research are continuous-variable propagating quantum microwaves. As opposed to discrete-variable (quantum-bit) based approaches, quantum information is encoded in a continuous degree of freedom such as space or momentum here. In this talk, I first introduce the fundamental concept of continuous-variable quantum systems in the context of superconducting circuits. Next,I summarize important milestones reached in the last years: generation and detection schemes, entanglement generation, displacement gate and finite-time correlations on single-mode squeezed and two-mode squeezed entangled microwave radiation. Finally, I discuss recent progress on the remote preparation of a squeezed microwave state.

Support is acknowledged from the German Research Foundation through FE 1564/1-1, the doctorate program ExQM of the Elite Network of Bavaria, the IMPRS ’Quantum Science and Technology’.