Benedetto Daniele MILITELLO1, Paolo ANIELLO2 and Antonino MESSINA1
1INFM, MIUR and
Dipartimento di Schienze Fisiche ed Astronomiche,
Universita di Palermo,
Via Archirafi 36,
I-90123 Palermo,
ITALY
2INFN, Dipartimento di Scienze Fisiche
dell'Universita di Napoli "Federico II",
Napoli,
ITALY
E-mail: bdmilite@fisica.unipa.it, Paolo.Aniello@na.infn.it, messina@fisica.unipa.it

A perturbative treatment of the evolution operator associated with Raman couplings

Abstract:
A perturbative treatment of the time evolution operator of a quantum system is applied to the model describing a trapped ion subjected to Raman coupling schemes in order to obtain a suitable "effective model". It is shown that the associated effective Hamiltonian describes the system dynamics up to a certain transformation which may be interpreted as a "dressing" of the effective model.