Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 47: Quantum Information (Quantum Communication and Quantum Repeater)
Q 47.4: Vortrag
Donnerstag, 17. März 2022, 11:15–11:30, Q-H12
Towards a nitrogen-vacancy center based quantum repeater — •Javid Javadzade1,2, Vadim Vorobyov1,2, Rainer Stöhr1, Wolfgang Fischer1, Florian Kaiser1,2, and Jörg Wrachtrup1,2,3 — 13rd Institute of Physics, University of Stuttgart, Stuttgart, Germany — 2Institute for Quantum Science and Technology IQST, Germany — 3Max-Planck Institute for Solid State Research, Stuttgart, Germany
The architecture of quantum repeaters is designed to solve the problem of signal fading in quantum communication lines (quantum internet) [1,2]. Single NV centers have shown their ability to be a working platform for the transmission of quantum signals [3]. Our strategy is to use NV center electron spin-photon time-bin entanglement in combination with nearby 13C spin (memory qubit) to establish communication links between repeater node and communication parties. We will present results of spin-bath characterization, where 4 suitable, weakly coupled 13C qubits were found with coupling strength in a range of 10-100 kHz. Moreover, Spin photon correlations - pre-entanglement measurement - with a fidelity of 0.8 will be shown. Additionally, the interferometer stabilization problem as long as further setup improvements will be discussed.
[1] D. Luong et al. Appl. Phys. B 122, 96 (2016). [2] C.H. Bennett & G. Brassard. Sci. 560, 7 (2014). [3] M. Pompili et al. Sci. 372, 259 (2021).