Titlebook: Electron Correlations in Molecules and Solids; P. Fulde Book 1995Latest edition Springer-Verlag Berlin Heidelberg 1995 Cluster.Correlation

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https://doi.org/10.1007/b106785on to the “size-consistency problem”. The energy is an extensive quantity, i.e., it doubles its value when the size of the system doubles. This feature should be preserved by any approximation when determining the energy. This is not the case when a configuration-interaction expansion like (4.1.1) i

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https://doi.org/10.1007/978-3-030-04158-8correlations not only on the ground state, but also on the low-energy excitations of the system. Of particular interest is the partition function Z or the free energy . of the electrons. When a grand-canonical ensemble is considered the free energy is replaced by the thermodynamic potential . We can

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https://doi.org/10.1057/9780230378063e large SCF energy, it is often of the same order of magnitude as the energy . one wants to calculate. An example is the binding energy of atoms in molecules, to which correlations contribute considerably. They should therefore be considered an important ingredient of chemical bonding.

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MOSFET High-Voltage Technologies,at most experiments in semiconductor physics can be described within a one-particle picture. It merely shows that the quasiparticle concept works very well in these systems. A noticeable exception is the fractional quantum Hall effect, which is based exclusively on correlations and in which the quas

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Change of HDL by Food Ingredient,isfactory microscopic theory of the effect became available, i.e., the one by . and . (BCS) [.]. The major obstacle theorists were faced with earlier can be summarized as follows. The superconducting transition temperature .. is usually of the order of 10 K, which corresponds to an energy of order 1