Frankfurt 2006 – scientific programme
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MO: Molekülphysik
MO 53: Molecular Quantum Computing
MO 53.2: Talk
Thursday, March 16, 2006, 14:30–14:45, H12
Quantification of Complementarity in Multi-Qubit Systems — •Xinhua Peng1,2, Xiwen Zhu2, Dieter Suter1, Jiangfeng Du3, Maili Liu2, and Kelin Gao2 — 1Fachbereich Physik, Universität Dortmund, 44221 Dortmund, Germany — 2Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China — 3Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
Complementarity was originally introduced as a qualitative concept for the discussion of properties of quantum mechanical objects that are classically incompatible. More recently, complementarity has become a quantitative relation between classically incompatible properties, such as visibility of interference fringes and "which-way" information, but also between purely quantum mechanical properties, such as measures of entanglement. We discuss different complementarity relations for systems of 2-, 3-, or n-qubits. Using nuclear magnetic resonance techniques, we have experimentally verified some of these complementarity relations in a two-qubit system. For three-qubit systems, we also propose an experimental scheme to verify some of the relevant complementarity relations for pure states.