Symmetry breaking in linear multipole traps

Abstract

Radiofrequency multipole traps have been used for some decades in cold collision experiments, and are gaining interest for precision spectroscopy due to their low mi-cromotion contribution, and the predicted unusual cold-ion structures. However, the experimental realisation is not yet fully controlled, and open questions in the operation of these devices remain. We present experimental observations of symmetry breaking of the trapping potential in a macroscopic octupole trap with laser-cooled ions. Numerical simulations have been performed in order to explain the appearance of additional local potential minima, and be able to control them in a next step. We characterize these additional potential minima, in particular with respect to their position, their potential depth and their probability of population as a function of the radial and angular displacement of the trapping rods.

References in corpus (23)

• Observation of a Discrete Time Crystal
• Space-time crystals of trapped ions
• Hawking Radiation from an Acoustic Black Hole on an Ion Ring
• Trapping of Topological-Structural Defects in Coulomb Crystals
• Sympathetic ground state cooling and time-dilation shifts in an ${}^{27}{\text{Al}}^{+}$ optical clock
• Aharonov-Bohm effect in the tunnelling of a quantum rotor in a linear Paul trap
• An ion ring in a linear multipole trap for optical frequency metrology
• Achieving translational symmetry in trapped cold ion rings
• Incomplete rotational cooling in a 22-pole ion trap
• Assembling a ring-shaped crystal in a microfabricated surface ion trap
• How can a 22-pole ion trap exhibit 10 local minima in the effective potential?
• About the dynamics and thermodynamics of trapped ions
• Entanglement Generation Using Discrete Solitons in Coulomb Crystals
• Ion dynamics in a linear radio-frequency trap with a single cooling laser
• Creating collective many-body states with highly excited atoms
• Crystallization of ion clouds in octupole traps: structural transitions, core melting, and scaling laws
• Stability and dynamics of ion rings in linear multipole traps
• Ion transport in macroscopic RF linear traps
• Structural phase transitions in multipole traps
• Fast and efficient transport of large ion clouds
• Parallel ion strings in linear multipole traps
• Experimental demonstration of an efficient number diagnostic for long 1D ion chains
• A double ion trap for large Coulomb crystals

Cited by in corpus (4)

• The physics and applications of strongly coupled plasmas levitated in electrodynamic traps
• Cold CAS Ion Trap -- 22 pole trap with ring electrodes for astrochemistry
• Correcting symmetry imperfections in linear multipole traps
• Defect generation and dynamics during quenching in finite size homogeneous ion chains