Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 47: Quantum Information: Quantum Computing and Communication I
Q 47.3: Vortrag
Donnerstag, 3. März 2016, 11:30–11:45, e214
Generation of Entangled Photon strings using Color centers in Diamond — •Durga B Rao Dasari1,2, Sen Yang1, and Jörg Wrachtrup1,2 — 13. Physikalisches Institut, Universität Stuttgart, Stuttgart — 2Max Planck Institute for Solid State Research, Stuttgart
Color centers in diamond make a robust quantum hybrid system comprising different species of quantum bits where, one kind couples strongly to the optical photons and the other has ultra long coherence times. While such hybrid devices can naturally be used as storage units for optical photons in a quantum network [1], they on the otherhand can also be used to mediate entanglement between subsequent photons with which the color center interacts [2].
In this talk I will present a scheme to generate entangled photons using nitrogen vacancy (NV) centers in diamond. We show how the long-lived nuclear spin in diamond can mediate entanglement between multiple photons, thereby increasing the length of the entangled photon string. With the proposed scheme one could generate both n-photon GHZ and cluster states. An experimental scheme realizing the same and estimates for the rate of entanglement generation both in the presence and absence of a cavity will also be shown.
[1]. Sen Yang et al. arXiv:1511.04939 [quant-ph]
[2]. D. D. Bhaktavatsala Rao et al. Phys. Rev. B 92, 081301(2015)(R)