Physics results in TCS?
The search technique simulated annealing is inspired by the physical process of annealing in metallurgy. 

Annealing is a heat treatment where the strength and hardness of the substance being treated can change dramatically. Often this involves heating the substance to an extreme temperature and then allowing it to cool slowly.

Simulated annealing avoids local minima/maxima in search spaces by incorporating a degree of randomness (the temperature) in the search process. As the search process proceeds, the temperature gradually cools, which means that the amount of randomness in the search decreases. Apparently it is quite an effective search technique.