Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-06-24
Int. J. Mod. Phys. B 25, 963 (2011)
Physics
Condensed Matter
Quantum Gases
8 pages, 2 figures. Proceedings of the International Conference on frustrated spin systems, cold atoms and nanomaterials (Hano
Scientific paper
10.1142/S021798491102667X
We review the infrared behavior of interacting bosons at zero temperature.
After a brief discussion of the Bogoliubov approximation and the breakdown of
perturbation theory due to infrared divergences, we show how the
non-perturbative renormalization group enables to obtain the exact infrared
behavior of the correlation functions.
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