Creation of double-well potentials in a surface-electrode trap towards a nanofriction model emulator

authored by
U. Tanaka, M. Nakamura, K. Hayasaka, A. Bautista-Salvador, C. Ospelkaus, T. E. Mehlstäubler

We demonstrate a microfabricated surface-electrode ion trap that is applicable as a nanofriction emulator and studies of many-body dynamics of interacting systems. The trap enables both single-well and double-well trapping potentials in the radial direction, where the distance between the two potential wells can be adjusted by the applied RF voltage. In the double-well configuration, parallel ion strings can be formed, which is a suitable system for the emulation of the Frenkel-Kontorova (FK) model. We derive the condition under which the trap functions as an FK model emulator. The trap is designed so that the Coulomb interaction between two ion strings becomes significant. We report on the microfabrication process for such downsized trap electrodes and experimental results of single-well and double-well operation with calcium ions. With the trap demonstrated in this work we can create atomically accessible, self-assembled Coulomb systems with a wide tuning range of the corrugation parameter in the FK model. This makes it a promising system for quantum simulations, but also for the study of nanofriction in one and higher dimensional systems.

Institute of Quantum Optics
External Organisation(s)
Osaka University
Japan National Institute of Information and Communications Technology
National Metrology Institute of Germany (PTB)
Quantum Science and Technology
Publication date
Publication status
Peer reviewed
ASJC Scopus subject areas
Atomic and Molecular Physics, and Optics, Materials Science (miscellaneous), Physics and Astronomy (miscellaneous), Electrical and Electronic Engineering
Electronic version(s) (Access: Open) (Access: Open)