Effect of a fermion on quantum phase transitions in bosonic systems

Details Effect of a fermion on quantum phase transitions in bosonic systems Effect of a fermion on quantum phase transitions in bosonic systems

2011-11-03

arxiv.org/abs/1111.0781v1

Phys. Lett. B 705 (2011) 379-382

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures

Scientific paper

The effect of a fermion with angular momentum j on quantum phase transitions of a (s,d) bosonic system is investigated. It is shown that the presence of a fermion strongly modifies the critical value at which the transition occurs, and its nature, even for small and moderate values of the coupling constant. The analogy with a bosonic system in an external field is mentioned. Experimental evidence for precursors of quantum phase transitions in bosonic systems plus a fermion (odd-even nuclei) is presented.

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