Deterministic reordering of 40Ca+ ions in a linear segmented Paul trap

Abstract

In the endeavour to scale up the number of qubits in an ion-based quantum computer several groups have started to develop miniaturized ion traps for extended spatial control and manipulation of the ions. Shuttling and separation of ion strings have been the foremost issues in linear-trap arrangements and some prototypes of junctions have been demonstrated for the extension of ion motion to two dimensions (2D). While junctions require complex trap structures, small extensions to the 1D motion can be accomplished in simple linear trap arrangements. Here, control of the extended field in a planar, linear chip trap is used to shuttle ions in 2D. With this approach, the order of ions in a string is deterministically reversed. Optimized potentials are theoretically derived and simulations show that the reordering can be carried out adiabatically. The control over individual ion positions in a linear trap presents a new tool for ion-trap quantum computing. The method is also expected to work with mixed crystals of different ion species and as such could have applications for sympathetic cooling of an ion string.

18 pages, 9 figures. Added section on possibility of adiabatic turn. Added appendix on point charge model. Other minor alterations/clarifications. Version now published (http://www.iop.org/EJ/abstract/1367-2630/11/10/103008)

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Cited by in corpus (25)

• Demonstration of the trapped-ion quantum-CCD computer architecture
• Ion-trap measurements of electric-field noise near surfaces
• Trapped-ion probing of light-induced charging effects on dielectrics
• Improved high-fidelity transport of trapped-ion qubits through a multi-dimensional array
• Simulating the performance of a distance-3 surface code in a linear ion trap
• Microfabricated Ion Traps
• Experimental realization of fast ion separation in segmented Paul traps
• Fast ion swapping for quantum information processing
• Holographic dynamics simulations with a trapped ion quantum computer
• Demonstration of integrated microscale optics in surface-electrode ion traps
• Initialization of quantum simulators by sympathetic cooling
• Operation of a planar-electrode ion-trap array with adjustable RF electrodes
• Arrays of open, independently tunable microcavities
• Transport of multispecies ion crystals through a junction in an RF Paul trap
• Optimum electrode configurations for fast ion separation in microfabricated surface ion traps
• Coherent rotations of qubits within a multi-species ion-trap quantum computer
• Ion transport and reordering in a two-dimensional trap array
• Shortcuts to adiabaticity for an ion in a rotating radially-tight trap
• Comparison of ancilla preparation and measurement procedures for the Steane [[7,1,3]] code on a model ion trap quantum computer
• Transport-enabled entangling gate for trapped ions
• Spatially-resolved potential measurement with ion crystals
• Dipole-phonon quantum logic with alkaline-earth monoxide and monosulfide cations
• Ablation loading of barium ions into a surface electrode trap
• Deterministic preparation of a dual-species two-ion crystal
• Inverse engineering of fast state transfer among coupled oscillators