Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 28: Quantum Information: Quantum Communication 1
Q 28.9: Vortrag
Mittwoch, 16. März 2011, 12:30–12:45, SCH A01
Experimental optimum unambiguous discrimination of two mixed single-photon states — •Gesine Steudle1, Sebastian Knauer1, Ulrike Herzog1, Erik Stock2, Dieter Bimberg2, and Oliver Benson1 — 1Humbolt-Universität Berlin, AG Nanooptik, Newtonstr. 15, 12489 Berlin — 2Technische Universität Berlin, Institut für Festkörperphysik, Hardenbergstr. 36, 10623 Berlin
The discrimination of quantum states [1,2 ] is a fundamental challenge in quantum communication. Particularly, the discrimination of two non-orthogonal quantum states can be performed unambiguously only at the expense of admitting inconclusive results.
In this contribution we present an experimental setup for optimum unambiguous discrimination between two non-orthogonal mixed states [3,4]. We show experimental results for two mixed single-photon states. The single photon source is based on Stranski-Krastanow-grown InAs dots which are embedded in a pin-junction to establish electrical pumping [5].
[1] J. A. Bergou et al., Lect. Notes Phys. 649, 417-465 (Springer, Berlin, 2004)
[2] S. M. Barnett and S. Croke, Adv. Opt. Photon. 1, 238-278 (2009)
[3] U. Herzog, Phys. Rev. A 75, 052309 (2007)
[4] U. Herzog and O. Benson, J. Mod. Opt. 56, 1362 (2009)
[5] A. Lochmann et al., Electron. Lett. 42, 774 (2006)