Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster: Quantum Optics and Photonics III

Q 42.35: Poster

Wednesday, March 2, 2016, 16:30–19:00, Empore Lichthof

Estimating necessary detector efficiencies for a Bell test using semidefinite programming — •Alexander Sauer, Nils Trautmann, and Gernot Alber — Institut für Angewandte Physik, Technische Universität Darmstadt

Loophole free violation of Bell inequalities is crucial for fundamental tests of quantum nonlocality. It is also important for future applications, such as device-independent quantum cryptography. Based on a detector model which includes detector inefficiencies and dark counts, we estimate the minimal requirements on detectors for performing a loophole free Bell test. Thereby, we also search for Bell inequalities which are robust against imperfect detectors in a bipartite setup. Our numerical investigation is based on semidefinite programming for characterizing possible quantum correlations[1]. We also examine critical detector efficiencies for a specific energy-time entanglement-based Bell experiment[2] designed to overcome limitations of Franson-type interferometers[3].

[1] M. Navascues, S. Pironio, and A. Acín, 2008, New J. Phys. 10, 073013. [2] A. Cabello, A. Rossi, G. Vallone, F. De Martini, and P. Mataloni, 2009, Phys. Rev. Lett. 102, 040401. [3] J.D. Franson, 1989, Phys. Rev. Lett. 62, 2205.