Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Quantum Communication IV

Q 31.4: Vortrag

Mittwoch, 13. März 2024, 11:45–12:00, HS 3219

Experimental boosted linear-optical Bell-state measurement — •Nico Hauser, Matthias Bayerbach, Simone D'Aurelio, and Stefanie Barz — Universität Stuttgart, Institut für funktionelle Materie und Quantentechnologien

Bell-state measurements are integral to many quantum communication and computation protocols. The conventional scheme for a linear-optical Bell-state measurement provides only a definite identification for two out of the four Bell states, resulting in an overall efficiency of 50%. Here we implement a scheme that significantly increases this efficiency by using an entangled ancillary photon pair and a fibre-based balanced 4x4 splitter. Using this scheme, we achieve a significant increase of the Bell-state measurement efficiency compared to the standard scheme.

Keywords: Bell-State Measurement; Quantum Entanglement; Photonic Quantum Computation