Hannover 2016 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 11: Poster: Quantum Optics and Photonics I
Q 11.30: Poster
Monday, February 29, 2016, 16:30–19:00, Empore Lichthof
Elementary model of a two–photon double–slit experiment — •Lucas Happ1, Maxim A Efremov1,2, and Wolfgang P Schleich1,3 — 1Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQST), Universität Ulm, D-89081 Ulm, Germany — 2A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, 119991 Moscow, Russia — 3Institute for Quantum Science and Engineering (IQSE), Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843
The principle of complementarity states that in a double–slit experiment the “which–slit” information cannot be measured at the same time as an interference pattern is observed. A recently performed experiment [1] targeted at the verification of this principle. The TEM01 mode for the pump light has been applied to create entangled photon pairs via SPDC in a nonlinear crystal. In this way, the entanglement can be used to locate the photons in one of the slits, while at the same time the TEM01 mode function, containing two distinct wave vectors, leads to interference in the far field.
We present an elementary model of this experiment by describing the nonlinear crystal by a gas of three–level atoms and the creation of photon pairs by a cascade decay of these atoms. Moreover, to explain the experimental results, we obtain the relevant detection probabilities in terms of the Glauber correlation functions.
[1] Menzel R, Puhlmann D, Heuer A and Schleich W P, Proc. Natl. Acad. Sci. U.S.A. 109, 9314 (2012)