Journal
ADVANCED SCIENCE LETTERS
Volume 4, Issue 1, Pages 1-11Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/asl.2011.1204
Keywords
Quantum States; Quantum Tomography
Categories
Funding
- EU
- Compagnia di San Paolo
- MIUR [PRIN 2007FYETBY, PRIN2005023443]
- Regione Piemonte [E14]
- CNR-CNISM
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The knowledge of the density matrix of a quantum state plays a fundamental role in several fields ranging from quantum information processing to experiments on foundations of quantum mechanics and quantum optics. Recently, a method has been suggested and implemented in order to obtain the reconstruction of the diagonal elements of the density matrix exploiting the information achievable with realistic on/off detectors, e.g. silicon avalanche photo-diodes, only able to discriminate the presence or the absence of light. The purpose of this paper is to provide an overview of the theoretical and experimental developments of the on/off method, including its extension to the reconstruction of the whole density matrix.
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