← Mathematical compendium

Published equation contexts

Var⁡g^\operatorname{Var}\hat g

Why this formula appears here

The shape difference between these two promises is the entire point of separating them. ϵL(t)\epsilon_L(t) is bounded in [0,1] and can, in principle, hit its floor abruptly once decoupling sets in. Var⁡\operatorname{Var}g^\hat g has no upper bound and shrinks only as fast as FQF_Q grows, which — as the next two sections show — need not be abrupt at all. A reader who asks “has the black hole given it back?” is asking two different kinds of question depending on which object they mean, and conflating them is precisely the failure mode this construction is built to prevent.

Read the full article-specific guide →

Read the representative guide

g^\hat g

Symbol hat g

hat g is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Read this term in its guide →

How to interpret it

Read this expression with the definitions, units, and assumptions supplied by the article.

Research cited beside this formula

Published contexts (2)

A symbol can carry a different meaning in another article. Each occurrence keeps its own guide and term definitions.

Var⁡g^\operatorname{Var}\hat g

Equation 47 · Evolutionary Physics

The Bit Comes Back Before the Bearing

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

The shape difference between these two promises is the entire point of separating them. ϵL(t)\epsilon_L(t) is bounded in [0,1] and can, in principle, hit its floor abruptly once decoupling sets in. Var⁡\operatorname{Var}g^\hat g has no upper bound and shrinks only as fast as FQF_Q grows, which — as the next two sections show — need not be abrupt at all. A reader who asks “has the black hole given it back?” is asking two different kinds of question depending on which object they mean, and conflating them is precisely the failure mode this construction is built to prevent.

Equation guide → · Article →
Var⁡g^\operatorname{Var}\hat g

Equation 135 · Evolutionary Physics

The Bit Comes Back Before the Bearing

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

A third, more uncomfortable check is what the toy model of the previous section actually implies at the numbers already computed: tLt_L ≈\approx 3.5\,ms\mathrm{ms} , or tLt_L/β\beta ≈\approx 28.2 , for the solar-mass hole above. Taking f1f_1 = 1 as an illustrative, explicitly assumed per-quantum information content, a modest tolerance δ\delta = 0.1\,rad\mathrm{rad} (about six degrees) gives tGt_G/β\beta = 100 , so tGt_G ≈\approx 12.4\,ms\mathrm{ms} and Δ\Delta tLGt_{LG} ≈\approx +8.9\,ms\mathrm{ms} : the compass is the slower debt, as the title claims. But a coarser tolerance, δ\delta = 0.5\,rad\mathrm{rad} (about twenty-nine degrees), gives tGt_G/β\beta = 4 , so tGt_G ≈\approx 0.50\,ms\mathrm{ms} and Δ\Delta tLGt_{LG} ≈\approx…

Equation guide → · Article →