Quantum interference structures in trapped ion dynamics beyond the Lamb-Dicke and rotating wave approximations

Abstract

We apply wave packet methods to study an ion-trap system in the strong excitation regime imposing neither the rotating wave nor the Lamb-Dicke approximations. By this approach we show the existence of states with restricted phase space evolution, as a genuine consequence of quantum interference between wave packet fractions. A particular instance of such a state oscillates between maximal entanglement and pure disentanglement between the constitute subsystems. The characteristic crossover time is very rapid making them suitable for state preparations of EPR or Schrodinger cat states. Over longer time periods the dynamics of these states exhibits collapse-revival patterns with well resolved fractional revivals in autocorrelation, inversion and entanglement.

11 pages, 5 figures. Replaced with revised version. Phys. Rev. A 77, 053808 (2008)

References in corpus (5)

• Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
• Cavity QED with a Bose-Einstein condensate
• Bose-Einstein condensate coupled to a nanomechanical resonator on an atom chip
• Cavity-enhanced superradiant Rayleigh scattering with ultra-cold and Bose-Einstein condensed atoms
• Long-lived mesoscopic entanglement outside the Lamb-Dicke regime

Cited by in corpus (4)

• Jahn-Teller systems from a cavity QED perspective
• Coupled two-component atomic gas in an optical lattice
• Quantum fluctuations in the mazer
• Dynamics of a quantum oscillator strongly and off-resonantly coupled with a two-level system