Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Quantum Effects: Interference and Correlations
Q 59.7: Talk
Friday, March 18, 2011, 12:00–12:15, SCH A01
Many-particle Quantum Walks — •Klaus Mayer1, Malte C. Tichy1, Florian Mintert1,2, Thomas Konrad3, and Andreas Buchleitner1 — 1Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany — 2Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstrasse 19, 79104 Freiburg, Germany — 3School of Physics, University of KwaZulu-Natal, Private Bag 54001, Durban 4000, South Africa
We study quantum walks of many non-interacting particles in a beam splitter array, as a paradigmatic testbed for the competition between single-particle and many-particle interference [1].
We derive a general expression for multi-mode particle number correlation functions, valid for initially entangled or non-entangled fermions and bosons, and infer pronounced signatures of many-particle interferences in the multi-mode counting statistics. The latter permits the differentiation of mere quantum statistical from pure many-particle interference effects.
[1] K. Mayer et al., arXiv: 1009.5241 (2010)