Atomtronics with holes: Coherent transport of an empty site in a triple well potential

TL;DR

This paper explores the coherent transport of an empty site, or hole, in a triple-well potential with two atoms, demonstrating potential applications in quantum devices like diodes and transistors.

Contribution

It introduces a method for adiabatic transport of a hole in a triple-well system and analyzes the process using ab initio simulations and quantum-trajectory approaches.

Findings

Successful adiabatic transport of a hole between traps

Insight into the transport process via de Broglie-Bohm trajectories

Proposal of hole-based quantum device components

Abstract

We investigate arrays of three traps with two fermionic or bosonic atoms. The tunneling interaction between neighboring sites is used to prepare multi-site dark states for the empty site, i.e., the hole, allowing for the coherent manipulation of its external degrees of freedom. By means of an ab initio integration of the Schr\"odinger equation, we investigate the adiabatic transport of a hole between the two extreme traps of a triple-well potential. Furthermore, a quantum-trajectory approach based on the de Broglie-Bohm formulation of quantum mechanics is used to get physical insight into the transport process. Finally, we discuss the use of the hole for the construction of a coherent single hole diode and a coherent single hole transistor.