title: Effect of symmetry breaking on level curvature distributions.
abstract: We derive an exact general formalism that expresses the eigenvector and the eigenvalue dynamics as a set of coupled equations of motion in terms of the matrix elements dynamics. Combined with an appropriate model Hamiltonian, these equations are used to investigate the effect of the presence of a discrete symmetry in the level curvature distribution. An explanation of the unexpected behavior of the data regarding frequencies of acoustic vibrations of quartz block is provided.
authors.affiliation: Center for Experimental and Theoretical Studies in Quantum Chaos and Related Areas (ETC), Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970 São Paulo, Brazil.
authors.forename: M S
authors.initials: MS
authors.lastname: Hussein
authors.forename: C P
authors.initials: CP
authors.lastname: Malta
authors.forename: M P
authors.initials: MP
authors.lastname: Pato
authors.forename: A P B
authors.initials: AP
authors.lastname: Tufaile