The Geometry of the Col

Ruppeiner information geometry at three temperatures

Three saddle surfaces show the ordered, critical, and disordered phases of the two-dimensional Ising model. The critical surface has the deepest valley and sharpest ridge, marking high sensitivity along both plotted coordinates.

Three saddle surfaces show the ordered, critical, and disordered phases of the two-dimensional Ising model. The critical surface has the deepest valley and sharpest ridge, marking high sensitivity along both plotted coordinates.