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Order indices of density matrices for finite systems (1301.1183v1)
Published 7 Jan 2013 in cond-mat.quant-gas and physics.chem-ph
Abstract: The definition of order indices for density matrices is extended to finite systems. This makes it possible to characterize the level of ordering in such finite systems as macromolecules, nanoclusters, quantum dots, or trapped atoms. The general theory is exemplified by explicit calculations of the order index for the first-order density matrix of bosonic atoms confined in a finite box at zero temperature.
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