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Operator Method for Quantum Statistics

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Part of the Lecture Notes in Physics book series (LNP,volume 894)


The construction of the uniformly available approximation (UAA) for thermodynamical functions has two specific features, which differ it from the solution of the Schrödinger equation for stationary states. First of all, these functions depend both on Hamiltonian parameters and on the temperature T.


  • Suitable Uniformity
  • Cumulant Expansion (CE)
  • Direct Summation Method
  • Zeroth Approximation
  • Effective Inverse Temperature

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  • DOI: 10.1007/978-3-319-13006-4_4
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Feranchuk, I., Ivanov, A., Le, VH., Ulyanenkov, A. (2015). Operator Method for Quantum Statistics. In: Non-perturbative Description of Quantum Systems. Lecture Notes in Physics, vol 894. Springer, Cham.

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