Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 59: Quantum Effects: Interference and Correlations

Q 59.9: Talk

Friday, March 18, 2011, 12:30–12:45, SCH A01

Entanglement measures and interference contrast — •Federico Levi and Florian Mintert — Freiburg Institute for Advanced Studies (FRIAS), Albert-Ludwigs-Universität Freiburg, Albertstr. 19, 79104 Freiburg.

Both entanglement and interference are phenomena that display the difference between a quantum system and its classical counterpart. They both originate from the quantum superposition principle, and they have been related to each other qualitatively e.g. in interference of photon pairs [1]. However, a clear, conceptual or quantitative connection between these two features of quantum mechanics has yet to be established, and quantifications of either of these features appear rather differently; the fringe contrast provides a clear experimental quantification of interference, whereas entanglement measures are typically rather abstract and do not offer any physical insight into the nature of entanglement.

With the goal to shed some light on the relationship between entanglement and quantum interference, we aim to construct entanglement measures in terms of the fringe contrast.

[1] M.A.Horne, A.Shimony, A.Zeilinger, Phys. Rev. Lett. 62, 2209 (1989).