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Название: Spectral Densities and Partition Functions of Modular Quantum Systems as Derived from a Central Limit Theorem
Авторы: Hartmann M., Mahler G., Hess O.
Using a central limit theorem for arrays of interacting quantum systems, we give analytical expressions for the density of states and the partition function at finite temperature of such a system, which are valid in the limit of infinite number of subsystems. Even for only small numbers of subsystems we find good accordance with some known, exact results.