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

TL;DR

This paper presents a microfabricated surface-electrode ion trap capable of emulating nanofriction models by creating adjustable double-well potentials, enabling studies of many-body dynamics and Coulomb systems for quantum simulation.

Contribution

It introduces a novel ion trap design that can switch between single and double-well potentials, facilitating nanofriction and many-body physics experiments.

Findings

Successful fabrication of the ion trap with adjustable double-well potentials.

Experimental demonstration of single and double-well trapping of calcium ions.

Potential for quantum simulation and nanofriction studies using the trap.

Abstract

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 a 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.