2 citations · 2 across the 5 of their papers we have counts for
5 papers
Monotone Multivalued Nonautonomous Dynamical Systems
José A. Langa, Jacson Simsen, Mariza Stefanello Simsen +1
This paper is devoted to the study of nonautonomous multivalued semiflows and their associated pullback attractors. For this kind of dynamical systems we are able to characterize t…
Stability for evolution equations with variable growth
Sergey Shmarev, Jacson Simsen, Mariza Stefanello Simsen
We study the character of dependence on the data and the nonlinear structure of the equation for the solutions of the homogeneous Dirichlet problem for the evolution -Lapla…
Quantum Energy Expectation in Periodic Time-Dependent hamiltonians via Green Functions
Cesar R. de Oliveira, Mariza S. Simsen
Let be the Floquet operator of a time periodic hamiltonian . For each positive and discrete observable (which we call a {\em probe energy}), we derive a formula for…
Almost Periodic Orbits and Stability for Quantum Time-Dependent Hamiltonians
Cesar R. de Oliveira, Mariza S. Simsen
We study almost periodic orbits of quantum systems and prove that for periodic time-dependent Hamiltonians an orbit is almost periodic if, and only if, it is precompact. In the cas…
A Floquet Operator with Pure Point Spectrum and Energy Instability
Cesar R. de Oliveira, Mariza S. Simsen
An example of Floquet operator with purely point spectrum and energy instability is presented. In the unperturbed energy eigenbasis its eigenfunctions are exponentially localized.