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Q: Fachverband Quantenoptik und Photonik

Q 66: Quantum Information: Photons and Nonclassical Light III

Q 66.7: Vortrag

Freitag, 12. März 2010, 15:30–15:45, E 214

A versatile source of polarization-entangled photons — Andreas Maser, Ralph Wiegner, Uwe Schilling, Christoph Thiel, and •Joachim von Zanthier — Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, 91058 Erlangen

We propose a method for the generation of a large variety of entangled states, encoded in the polarization degrees of freedom of N photons, within the same experimental setup. Starting with uncorrelated photons, emitted from N arbitrary single photon sources, and using linear optical tools only, we demonstrate the creation of all symmetric states, e.g., GHZ- and W-states, as well as all (symmetric and non-symmetric) total angular momentum eigenstates of the N qubit compound. Amongst others, the scheme also enables to generate all canonical states representing the possible entanglement families of symmetric states inequivalent under SLOCC as recently defined in [1]. The technique thus comes close to the ideal of a single apparatus “that tunes in any wanted multipartite entangled state by simply turning a knob” [2].

[1] T. Bastin, S. Krins, P. Mathonet, M. Godefroid, L. Lamata, and E. Solano, PRL 103, 070503 (2009).

[2] M. Aspelmeyer and J. Eisert, Nature 455, 180 (2008).