Coherent adiabatic transport of atoms in radio-frequency traps

TL;DR

This paper proposes a realistic radio-frequency trap setup on atom chips for high-fidelity coherent adiabatic transport of atoms, overcoming previous experimental challenges and enabling improved manipulation of atomic clouds.

Contribution

It introduces a practical RF trap system that maintains resonance and tunable tunneling rates for adiabatic passage, achieving near-perfect fidelity.

Findings

Close to 100% fidelity in atom transport

Enhanced adiabatic passage with interacting atomic clouds

Feasible experimental implementation on atom chips

Abstract

Coherent transport by adiabatic passage has recently been suggested as a high-fidelity technique to engineer the centre-of-mass state of single atoms in inhomogenous environments. While the basic theory behind this process is well understood, several conceptual challenges for its experimental observation have still to be addressed. One of these is the difficulty that currently available optical or magnetic micro-trap systems have in adjusting the tunneling rate time-dependently while keeping resonance between the asymptotic trapping states at all times. Here we suggest that both requirements can be fulfilled to a very high degree in an experimentally realistic setup based on radio frequency traps on atom chips. We show that operations with close to 100% fidelity can be achieved and that these systems also allow significant improvements for performing adiabatic passage with interacting atomic clouds.