Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Average bubble length vs. time for several 𝒯s; the solid lines are fits to the form L(t) = a + b ln t. (b) Slope b of the logarithmic time dependence of L(t) for various 𝒯s. The solid line is the corresponding quantity for the upper bound of the bubble length L*(t); see text.
