Equation 41 · Part 3 · A Reference Frame Becomes Classical by Publishing Its Orientation

Symbol h

M_F(d(h\hat g))= U_F(h)M_F(d\hat g)U_F(h)^\dagger.

h

What this part means

h is an argument of the function-like quantity on the left; its role is set by that function’s stated inputs.

Its job in the formula

h is an argument of the function-like quantity on the left; its role is set by that function’s stated inputs.

Full expressionSymbol hArticle meaning

The passage around this formula

An estimator is generated by a positive-operator-valued measure $M_F(d\hat g)$ on the fragment. Covariance requires that rotating the encoded state by h rotates the distribution of estimates by the same group action. In schematic form, $M_F(d(h\hat g))= U_F(h)M_F(d\hat g)U_F(h)^\dagger$ . Group-covariant estimation is established machinery. Bagan, Baig, and Muñoz-Tapia derived optimal strategies for transmitting and estimating Cartesian frames with finite spin systems [ 5 ] .…

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Learn the underlying idea

A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

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Sources cited in the surrounding passage

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