Improved anharmonic trap expansion through enhanced shortcuts to adiabaticity

TL;DR

This paper introduces an advanced method called enhanced shortcuts to adiabaticity (eSTA) that improves quantum control by incorporating higher order terms, leading to better fidelity and robustness in trap expansion tasks.

Contribution

The authors generalize the eSTA method to include higher order terms, enhancing its applicability and effectiveness in quantum trap expansion.

Findings

eSTA improves fidelity in trap expansion

eSTA demonstrates increased robustness

Application to Gaussian and lattice potentials

Abstract

Shortcuts to adiabaticity (STA) have been successfully applied both theoretically and experimentally to a wide variety of quantum control tasks. In previous work the authors have developed an analytic extension to shortcuts to adiabaticity, called enhanced shortcuts to adiabaticity (eSTA), that extends STA methods to systems where STA cannot be applied directly [Phys. Rev. Research 2, 023360 (2020)]. Here we generalize this approach and construct an alternative eSTA method that takes advantage of higher order terms. We apply this eSTA method to the expansion of both a Gaussian trap and accordion lattice potential, demonstrating the improved fidelity and robustness of eSTA.