| 单词 | partition function |
| 释义 | partition function The quantity Z defined by Z = iΣexp (-Ei/kT ), where the sum is taken over all states i of the system. Ei is the energy of the ith state, k is the Boltzmann constant, and T is the thermodynamic temperature. Z is a quantity of fundamental importance in equilibrium statistical mechanics. For a system in which there are nontrivial interactions, it is very difficult to calculate the partition function exactly. For such systems it is necessary to use approximation techniques and/or model systems. The partition function links results at the atomic level to thermodynamics, since Z is related to the Helmholtz free energyF by F = kTlnZ |
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