title: Temperature-dependent energy levels and size-independent thermodynamics.
abstract: We show that, by properly adopting the notion of temperature-dependent energy levels, the standard tools of differential thermodynamics can be used for a consistent thermostatistical description irrespective of system size. In this framework the paradigmatic (yet not always descriptive) large-system limit is no longer a necessary assumption for differential thermodynamics. We present a generalized relation between temperature and internal energy which extends thermodynamics all the way to isolated quantum systems.
authors.affiliation: Department of Natural Science, Sør-Trøndelag University College, 7004 Trondheim, Norway. rodrigo.demiguel@hist.no.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: de Miguel