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Generalizações do truque de Kotani
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Matemática - PPGMCâmpus São Carlos, 2016-02-17)
We present a study of rank-one perturbations of self-adjoint and unitary operators, in particular related to the so-called Kotani’s trick. In Chapter 2 we recall relevant definitions and elementary facts. In Chapter 3 we ...
Thompson-type formulae
(Academic Press Inc Elsevier Science, 2012-02)
Let X and Y be two n×n Hermitian matrices. In the article Proof of a conjectured exponential formula (Linear Multilinear Algebra 19 (1986) 187-197) R.C. Thompson proved that there exist two n×n unitary matrices U and V ...
Nonequilibrium quantum phase transitions in the xy model: comparison of unitary time evolution and reduced density operator approaches
(INSTITUTE OF PHYSICS PUBLISHING DEUTSCHE PHYSIKALISCHE GESELLSCHAFT, 2014)
Nonequilibrium quantum phase transitions in the xy model: comparison of unitary time evolution and reduced density operator approaches
(INSTITUTE OF PHYSICS PUBLISHING DEUTSCHE PHYSIKALISCHE GESELLSCHAFT, 2014)
Spectral properties for perturbations of unitary operators
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2011)
Nonequilibrium quantum phase transitions in the xy model: comparison of unitary time evolution and reduced density operator approaches
(INSTITUTE OF PHYSICS PUBLISHING DEUTSCHE PHYSIKALISCHE GESELLSCHAFT, 2014)