Equation 10 · Part 2 · The Statistical Mechanics of Irreversibility at Molecular Scale
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What this part means
Capital delta attached to a quantity marks a difference between two values of that quantity; the article’s sign convention determines the order.
Its job in the formula
Capital delta attached to a quantity marks a difference between two values of that quantity; the article’s sign convention determines the order.
Full expression→change→Article meaning
The passage around this formula
In equilibrium statistical mechanics, the free-energy difference F between two control-parameter values is a state function. A rapid drive between them generally performs work W> F on average because dissipation is positive. It would seem that estimating F requires an impractically slow, quasistatic protocol. The Jarzynski equality demonstrates otherwise:
Learn the underlying idea
Addition combines quantities; subtraction measures the signed difference between them. Parentheses show what is combined before the rest of the expression is evaluated.
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Sources cited in the article section
- [2] Nonequilibrium Equality for Free Energy Differences ↗
- [3] Entropy production fluctuation theorem and the nonequilibrium work relation for free energy differences ↗
These citations provide research context; check each source for the exact claim it supports.