Quantum measurement with post-selection for two mixed states

In this paper, we will discuss the possibility of increasing the Holevo value when measuring with post-selection. By measurement with post-selection we mean that some of the outcomes of the measurement are discarded, and then we work with the resulting states. Using the example of two mixed states,...

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Bibliographic Details
Main Authors: Kenbaev, N. R., Kronberg, D. A.
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:In this paper, we will discuss the possibility of increasing the Holevo value when measuring with post-selection. By measurement with post-selection we mean that some of the outcomes of the measurement are discarded, and then we work with the resulting states. Using the example of two mixed states, it will be shown that mutual information after performing post-selection is greater than their initial Holevo value. An increase in the Holevo value follows from the monotonicity property of the quantum relative entropy.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0054964