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Q: Fachverband Quantenoptik und Photonik

Q 59: Quantum Effects: Interference and Correlations

Q 59.7: Vortrag

Freitag, 18. März 2011, 12:00–12:15, SCH A01

Many-particle Quantum Walks — •Klaus Mayer¹, Malte C. Tichy¹, Florian Mintert^1,2, 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)