Equation 70 · A Reference Frame Becomes Classical by Publishing Its Orientation
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Symbol S
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Symbol O
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For orientation, several parameters and noncommuting rotation generators enter. The best measurement for one component may be incompatible with the best measurement for another. A local Fisher matrix near a known orientation does not automatically yield a globally covariant estimator over SO(3) , and a bound need not be attainable by each finite fragment. Multiplying fragment QFI by a count can also double-count correlations if the fragments are not independent.
Sources cited in the article section
- [9] Statistical Distance and the Geometry of Quantum States ↗
- [10] Quantum Estimation for Quantum Technology ↗
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