Equation 15 · Part 2 · Decoherence: The Quiet Selection That Makes the World Look Solid
Symbol t
What this part means
t 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
t is an argument of the function-like quantity on the left; its role is set by that function’s stated inputs.
Full expression→Symbol t→Article meaning
The passage around this formula
The same paper also tracks what happens to the coherence length itself, not just the decay rate: solving the full master equation for a free particle gives a coherence width l(t) = (8 t)^{-1/2} , meaning it shrinks as the inverse square root of time for as long as scattering dominates, and does so from whatever width the particle’s wave packet started with [ 7 ] . Joos and Zeh flag the counterintuitive consequence themselves: the everyday expectation that a free wave packet…
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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