Statistical Description of a Physical System

  • Silvio R. A. Salinas
Part of the Graduate Texts in Contemporary Physics book series (GTCP)


The mechanico-statistical analysis of a physical system in equilibrium comprises the following steps: (i) The specification of the microscopic states of the system (which form a set called statistical ensemble); (ii) the statement of a statistical postulate in order to use the theory of probabilities — for a system with fixed total energy, we invoke the simplifying assumption of equal a priori probabilities, which leads to the microcanonical ensemble — and (iii) the establishment of a connection with the visible variables of the macroscopic world (that is, with thermodynamics).


Phase Space Quantum System Physical System Free Particle Statistical Ensemble 
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Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • Silvio R. A. Salinas
    • 1
  1. 1.Instituto de FisicaUniversidade de São PaoloSão PaoloBrazil

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