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Optica Publishing Group
  • Optical Fiber Communication Conference and International Conference on Quantum Information
  • 2001 OSA Technical Digest Series (Optica Publishing Group, 2001),
  • paper PB27
  • https://doi.org/10.1364/ICQI.2001.PB27

Information gain and entropy change in generalized quantum measurements

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Abstract

The generalized measurements that decrease the entropy of the measured system in average are characterized in terms of their completely positive map valued measures. A lower bound for the entropy decrease is also obtained.

© 2001 Optical Society of America

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