While a positive operator valued measure gives the probabilities in a quantum measurement, an instrument gives both the probabilities and the a posteriori states. By interpreting the instrument as a quantum channel and by using the typical inequalities for the quantum and classical relative entropies, many bounds on the classical information extracted in a quantum measurement, of the type of the Holevo bound, are obtained in a unified manner. (c) 2005 Pleiades Publishing, Inc.
Instruments and channels in quantum information theory / A. Barchielli, G. Lupieri. - In: OPTICS AND SPECTROSCOPY. - ISSN 0030-400X. - 99:3(2005), pp. 425-432.
Instruments and channels in quantum information theory
G. LupieriUltimo
2005
Abstract
While a positive operator valued measure gives the probabilities in a quantum measurement, an instrument gives both the probabilities and the a posteriori states. By interpreting the instrument as a quantum channel and by using the typical inequalities for the quantum and classical relative entropies, many bounds on the classical information extracted in a quantum measurement, of the type of the Holevo bound, are obtained in a unified manner. (c) 2005 Pleiades Publishing, Inc.
Pubblicazioni consigliate
I metadati presenti in AIR sono rilasciati con licenza CCO mentre i file delle pubblicazioni sono rilasciati con licenza CC BY-SA, salvo diversa indicazione. In caso di violazione di copyright, contattare l'assistenza di AIR
