Symbol chi_H
ch is part of the quantity the equation computes from the expression on the right.
Read this term in its guide →Published equation contexts
Why this formula appears here
There is another number in the same pair of states. The Holevo quantity of the equal-prior pure ensemble is . It is the von Neumann entropy of the average conditional state because each conditional state is pure. Holevo’s theorem makes this quantity an upper bound on classical information accessible through a quantum measurement, not a guarantee that an arbitrary one-copy receiver attains it [ 13 ] . Fuchs and Caves developed ensemble-dependent bounds that make the gap between a state’s information content and a receiver’s accessible information explicit [ 15 ] .
Read the representative guide
Symbol T
T occurs above the fraction bar. The numerator is divided by the entire denominator below it.
Read this term in its guide →Symbol h_2
is one of the signed contributions combined to compute the quantity on the left.
Read this term in its guide →Symbol V
V occurs above the fraction bar. The numerator is divided by the entire denominator below it.
Read this term in its guide →Denominator: 2
The complete quantity below the fraction bar; it must be nonzero for this division.
Read this term in its guide →How to interpret it
With a fixed numerator, increasing a nonzero denominator reduces the fraction. Read it with the definitions, units, and assumptions supplied by the article.
Research cited beside this formula
Published contexts (1)
A symbol can carry a different meaning in another article. Each occurrence keeps its own guide and term definitions.
Equation 13 · Evolutionary Physics
How Fast Can a Horizon Learn Which Path You Took?
This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.
There is another number in the same pair of states. The Holevo quantity of the equal-prior pure ensemble is . It is the von Neumann entropy of the average conditional state because each conditional state is pure. Holevo’s theorem makes this quantity an upper bound on classical information accessible through a quantum measurement, not a guarantee that an arbitrary one-copy receiver attains it [ 13 ] . Fuchs and Caves developed ensemble-dependent bounds that make the gap between a state’s information content and a receiver’s accessible information explicit [ 15 ] .
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