Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 36: Photonics II

Q 36.5: Talk

Wednesday, March 13, 2019, 15:00–15:15, S Gr. HS Maschb.

State generation by quantum feedback in parametric down-conversion — •Melanie Engelkemeier, Evan Meyer-Scott, Jan Sperling, Sonja Barkhofen, Benjamin Brecht, and Christine Silberhorn — Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn

We put forward a time-multiplexed all-optical scheme capable of efficiently generating complex tensor network states and higher-order Fock states. The core operation of this scheme is quantum feedback in parametric down-conversion (PDC). Feeding back one output of the PDC leads to a coherent self-stimulation of the process that generates new correlations in the output state. The so-generated states are well suited for quantum communication and computation applications [1]. In this talk, we report on the theoretical and experimental advances of this ambitious project.

[1] I. Dhand et al., Phys. Rev. Lett. 120, 130501 (2018).