Abstract
The influence of quantum phase transitions on the evolution of excited levels in the critical parameter region is discussed. The analysis is performed for one- and two-dimensional systems with first- and second-order ground-state transitions. Examples include the cusp and nuclear collective Hamiltonians. Applications in systems of higher dimensions are possible.
- Received 25 June 2008
DOI:https://doi.org/10.1103/PhysRevE.78.031130
©2008 American Physical Society