title: Landau theory of shape phase transitions in the cranked interacting boson model.
abstract: Landau theory of phase transitions is applied to quadrupole shapes of rotating atomic nuclei within the interacting boson model (IBM) with cranking. It is shown that the coherent-state method must be generalized to allow for non-Hermitian quadrupole tensors of the coherent-state coefficients, which results in important modifications of the cranking shape-phase diagram compared to previous non-IBM studies of rotating nuclei. The parameter space has two surfaces of the first-order phase transitions and a curve of the second-order phase transition at their intersection. The phase structure of the cranked IBM closely resembles systems with competing superconducting and normal phases.
authors.affiliation: Institute of Particle and Nuclear Physics, Charles University, V Holesovickách 2, 180 00 Prague, Czech Republic.
authors.forename: Pavel
authors.initials: P
authors.lastname: Cejnar