# Free energy from TPQ calculations

Up to HΦ Forum / HΦ フォーラムHi,

as far as I understand the docs, results for the free energy or the entropy are not directly computed or written to the output files in the TPQ calculations. Therefore I would like to ask you, what would be the best way to obtain these observables? I think one way to obtain the entropy would be to integrate the inverse temperature by the energy, but maybe there is a more direct way to obtain S? Thank you in advance!

Best regards,

and keep up the great work!

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