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The present article is about the statistical mechanics of non-trivial fieldconfigurations. The non-trivial fields arise from the negative sign of thecommutators and the anticommutators of the bosonic and fermionic fieldexcitations. These kinds of fields were previously studied by Pauli and Lee andWick. The thermal distribution function of the above mentioned fields arecalculated in the article and using the thermal distribution functions theenergy density, pressure and entropy density of the non-trivial fieldconfigurations are found out. The results match exactly with a previouscalculation done by Fornal et. al. for higher derivative Lee-Wick theoriesshowing a deeper similarity with the earlier work. It is assumed that suchkinds of non-trivial fields may have existed in the early universe and may havesome cosmological relevance.

Thermodynamics of the Pauli oscillators and Lee-Wick partners of the Standard Model particles