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Nature Physics 4, 834 - 835 (2008)
doi:10.1038/nphys1124
Subject Category: Quantum physics
Quantum many-body theory: Divide, perturb and conquer
Michael M. Wolf1
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Michael M. Wolf is at the Niels Bohr Institute, Blegdamsvej 17, 2100 Copenhagen, Denmark.
e-mail: wolf@nbi.dk
Abstract
A fresh take on perturbation theory allows quantum-mechanical interactions to be simplified, while preserving low-energy properties, and deepens understanding of the complexity of quantum systems.
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