학술논문
Time evolution of two-level systems driven by periodic fields.
Document Type
Journal
Author
Barata, J. C. A. (BR-SPL-P) AMS Author Profile; Cortez, D. A. (BR-SPL-P) AMS Author Profile
Source
Subject
81 Quantum theory -- 81Q General mathematical topics and methods in quantum theory
81Q05Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other equations of quantum mechanics
81Q05
Language
English
Abstract
Summary: ``We describe a method to compute perturbative expansions for two-level systems driven by periodic time-dependent fields. Our expansions do not contain secular terms, and are therefore convenient for the study of long-time properties. We apply the method to the case of ac-dc fields and analyse situations where an approximate effect of dynamical localisation is exhibited.''