Rotational dynamics of a diatomic molecular ion in a Paul trap

Abstract

We present models for a heteronuclear diatomic molecular ion in a linear Paul trap in a rigid-rotor approximation, one purely classical, the other where the center-of-mass motion is treated classically while rotational motion is quantized. We study the rotational dynamics and their influence on the motion of the center-of-mass, in the presence of the coupling between the permanent dipole moment of the ion and the trapping electric field. We show that the presence of the permanent dipole moment affects the trajectory of the ion, and that it departs from the Mathieu equation solution found for atomic ions. For the case of quantum rotations, we also evidence the effect of the above-mentioned coupling on the rotational states of the ion.

References in corpus (7)

• Specific chemical reactivities of spatially separated 3-aminophenol conformers with cold Ca${}^{+}$ ions
• Precision Spectroscopy of Polarized Molecules in an Ion Trap
• Chemical reactions of conformationally selected molecules in a beam with Coulomb-crystallized ions
• Microwave quantum logic spectroscopy and control of molecular ions
• Wave-packet dynamics of an atomic ion in a Paul trap: approximations and stability
• Molecular heat pump for rotational states
• Femtosecond wavepacket interferometry using the rotational dynamics of a trapped cold molecular ion

Cited by in corpus (6)

• Electric trapping and circuit cooling of charged nanorotors
• Thermodynamic properties of the trigonometric Rosen-Morse potential and applications to a quantum gas of mesons
• Rotational state changes in collisions of diatomic molecular ions with atomic ions
• Translational dynamics of diatomic molecule in magnetic quadrupole trap
• Rotational excitation in sympathetic cooling of diatomic molecular ions by laser-cooled atomic ions
• Quantum stability of an ion in a Paul trap revisited