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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Experimental information complementarity of two-qubit states

A Fedrizzi1,3, B Škerlak1, T Paterek2, M P de Almeida1 and A G White1

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The concept of information offers a more complete description of complementarity than the traditional approach based on observables. We present the first experimental test of information complementarity for two-qubit pure states, achieving close agreement with theory. We also explore the distribution of information in a comprehensive range of mixed states. Our results highlight the strange and subtle properties of even the simplest quantum systems; for example, entanglement can be increased by reducing the correlations between two subsystems.


PACS

03.67.Lx Quantum computation architectures and implementations

03.67.Mn Entanglement measures, witnesses, and other characterizations

03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)

Subjects

Computational physics

Quantum information and quantum mechanics

Dates

Issue 5 (May 2011)

Received 21 October 2010

Published 20 May 2011



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