Equation 15 · Part 1 · Decoherence: The Quiet Selection That Makes the World Look Solid
Symbol l
What this part means
l is part of the quantity the equation computes from the expression on the right.
Its job in the formula
l is part of the quantity the equation computes from the expression on the right.
Full expression→Symbol l→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…
Learn the underlying idea
A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.
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Sources cited in the surrounding passage
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