Equation 110 · Part 1 · The Bit Comes Back Before the Bearing
Symbol F_Q
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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
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 F_Q→Article meaning
The passage around this formula
This is also where the resource-theoretic framing earns its keep rather than decorating the calculation. Bartlett, Rudolph, and Spekkens quantify exactly this kind of scarcity with what they call the asymmetry of a state relative to a group — a monotone that can only decrease under operations respecting the symmetry, never increase, no matter how cleverly the decoding is done [ 9 ] . [] is one such monotone for this problem: scrambling redistributes the compass’s asymmetry across more and more of the radiation, but a symmetry-respecting evaporation isometry cannot manufacture more of it than the infalling compass supplied, and no clever choice of decoder can extract…
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Sources cited in the surrounding passage
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