Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 4: Poster: Quantum Information

QI 4.18: Poster

Montag, 5. September 2022, 18:00–20:00, P2

Microwave quantum teleportation over thermal channels — •Wun Kwan Yam1,2, Michael Renger1,2, Simon Gandorfer1,2, Florian Fesquet1,2, Kedar Honasoge1,2, Fabian Kronowetter1,2,3, Yuki Nojiri1,2, Maria-Teresa Handschuh1,2, Achim Marx1, Rudolf Gross1,2,4, and Kirill G. Fedorov1,21Walther-Meißner-Institut, BAdW, 85748 Garching, Germany — 2Physik-Department, TUM, 85748 Garching, Germany — 3Rohde & Schwarz GmbH & Co. KG, 81671 Munich, Germany — 4Munich Center for Quantum Science and Technology, 80799 Munich, Germany

Microwave quantum communication enables quantum local area networks between superconducting quantum processors and, thereby, paves the way towards distributed quantum computing. Quantum teleportation belongs to the most relevant quantum communication protocols. It permits efficient and unconditionally secure transfer of quantum states. Recent experimental demonstration of quantum teleportation with propagating microwaves [1] motivates the investigation of its resilience against experimental imperfections. To this end, we analyze the effect of thermal noise in the analog feedforward channel. We show that quantum teleportation implements an error correction scheme for loss and noise in the feedforward signal. Furthermore, we consider realistic operating parameters and find that the teleportation fidelity can exceed the no-cloning threshold for finite energy codebooks.

[1] K. G. Fedorov et al., “Experimental quantum teleportation of propagating microwaves", Sci. Adv. 7, eabk0891 (2021)

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