Phase Transitions Microscopic Model

TL;DR

This paper introduces a microscopic model for nodes interacting as statistical systems, analyzing how phase transitions occur at the microscopic level based on entropy changes and external parameters like pressure and temperature.

Contribution

It presents a novel microscopic model linking node configurations with phase transition types, distinguishing first- and second-order transitions based on entropy criteria.

Findings

First-order transitions occur when entropy change exceeds ln4.

Second-order transitions happen otherwise.

The model explains microscopic distinctions between phase transition types.

Abstract

The microscopic model in which nodes interacting with each other are statistical systems is introduced. The nodes conditions are connected with a string of distinct microscopic configurations and depend on external parameters (pressure and temperature). In this model the consequent description of first- and second-order phase transitions is carried out and their microscopic level distinctions are analyzed. It is shown that first-order transitions occur when the configuration entropy change at nodes under transitions from dipole-active (low-symmetric) state to symmetric one is more than ln4. Otherwise the second-order transitions take place.