Equation 14 · Part 1 · The Bit Comes Back Before the Bearing
Symbol hat J
What this part means
hat J is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
hat J is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol hat J→Article meaning
The passage around this formula
…carrier; a bounded-size probe transmits a frame with a fidelity that improves with the carrier’s own total angular momentum but never reaches unity at finite size [ 10 ] . Restricting to one axis keeps the generator a single Hermitian operator with a single real eigenvalue spectrum, which is exactly the structure the quantum Cramér-Rao bound below is built for; nothing in the argument that follows depends on stopping at one axis, and a full three-axis version would simply replace a single Fisher…
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Sources cited in the surrounding passage
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