Symbol Δ x

The passage around this formula

Reading a decoherence time off this table only requires the exponent above: a superposition separated by $\Delta$ x decays with a characteristic time t $\sim$ 1/($\Lambda$\, $\Delta$ $x^2$) . Take the largest grain delocalized over roughly its own diameter, $\Delta$ x $\approx$ 10^{-3} centimetres, and the numbers in the first column turn into times measured in seconds only in the single, almost pathologically…

Read this part in the article →