Eur. Phys. J. D 10, 197-203 (2000)
https://doi.org/10.1007/s100530050541

Quasienergy states of trapped ions

Institut für Physik, Johannes-Gutenberg-Universität, 55099 Mainz, Germany

Received: 24 June 1999
Revised: 18 September 1999
Published online: 15 May 2000

Abstract

The quantum models for a single trapped ion are extended to the description of the collective dynamics for systems of ions confined in quadrupole electromagnetic traps with cylindrical symmetry. A class of quantum Hamiltonians with suitable axial and radial interaction potentials given by homogeneous functions of degree and invariant under translations and axial rotations are introduced. The considered axial and radial quantum Hamiltonians for the center-of-mass and relative motions are described by collective dynamical systems associated to the symplectic group . Discrete quasienergy spectra are obtained and the corresponding quasienergy states are explicitly realized as coherent states parameterized by the stable solutions of the corresponding classical motion equations. Consequently, a correspondence between quantum and classical stability domains is established.