Abstract
We present a generalized equations-of-motion method that efficiently calculates energy spectra and matrix elements for algebraic models. The method is applied to a five-dimensional quartic oscillator that exhibits a quantum phase transition between vibrational and rotational phases. For certain parameters, matrices give better results than obtained by diagonalizing matrices.
- Received 7 November 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.080401
©2007 American Physical Society