Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.71: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II
Non-monotonic signatures of many-particle indistinguishability — •Malte C. Tichy1,2, Young-Sik Ra3, Hyang-Tag Lim3, Osung Kwon3, Florian Mintert1,4, Yoon-Ho Kim3, and Andreas Buchleitner1 — 1Physikalisches Institut der Albert-Ludwigs-Universität, D-79104 Freiburg — 2Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus, Denmark — 3Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Korea — 4Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität, D-79104 Freiburg
Many-particle interference effects, which constitute a building block for applications in quantum technologies, require the precise understanding and faithful manipulation of the mutual indistinguishability of the interfering particles. We study theoretically and experimentally the transition between many distinguishable and indistinguishable particles in scattering setups that exhibit many-particle interference. A theoretical exact few-particle study is confirmed by a four-photon Hong-Ou-Mandel type interference experiment, while a complementary semiclassical approach allows an approximate description of the behavior in the limit of many particles. Surprisingly, interference signals are non-monotonic in the inter-particle distinguishability in the vast majority of possible setups, which is explained by the competition of many-particle interference terms of various degrees.