Inter-basin fluctuations in glass-forming liquids: short time and long   time thermodynamic susceptibilities
  Thermodynamic effects of local structure fluctuations in glassformers are analyzed in terms of energy basins and inter-basin hopping. Depending on the time-scale of measurement, one observes short-time thermodynamic properties related to a narrow set of basins, or equilibrium properties that include structural relaxation. The inter-basin hopping is manifested by the fluctuations of the pressure, internal energy, and other thermodynamic short time characteristics. Formulas relating the inter-basin fluctuations of pressure and internal energy to the differences between the long- and short-time susceptibilities are found. Based on obtained relations, we discuss the relative sensitivity of the structure to temperature and pressure. 
Alexander Z. Patashinski, Mark A. Ratner (Department of Chemistry and   Materials Research Center, Northwestern University, ...