Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 60: Quantum Information: Photons and Nonclassical Light 2
Q 60.3: Vortrag
Freitag, 18. März 2011, 11:00–11:15, SCH 251
Four-Photon Distinguishability Transition — •Malte C. Tichy1, Hyang-Tag Lim2, Young-Sik Ra2, Florian Mintert1,3, Yoon-Ho Kim2, and Andreas Buchleitner1 — 1Physikalisches Institut - Universität Freiburg - Hermann-Herder-Str. 3 - D-79104 Freiburg — 2Department of Physics - Pohang University of Science and Technology (POSTECH) - Pohang, 790-784, Korea — 3Freiburg Institute for Advanced Studies (FRIAS) - Universität Freiburg - Albertstr. 19 - D-79104 Freiburg
The propagation of photons through a four-port beam-splitter is considered theoretically and experimentally with photon quadruplets created by spontaneous parametric down-conversion [1]. All event probabilities turn out to be sensitively dependent on the mutual indistinguishability of the photons. We find that the rate of individual output events -- which may be either enhanced or suppressed with respect to the case of distinguishable particles -- depends non-monotonically on the degree of distinguishability, and explain this behavior in terms of an intricate interplay between constructive and destructive many-particle interferences. These effects constitute qualitatively new features with respect to the well-known two-photon Hong-Ou-Mandel effect.
[1] M.C. Tichy et al., arXiv:1009.4998