Quantum Control via Enhanced Shortcuts to Adiabaticity

TL;DR

The paper introduces enhanced shortcuts to adiabaticity (eSTA), a new quantum control technique that improves existing protocols by analytically correcting for complex Hamiltonians, demonstrated in atomic state manipulation and ion transport.

Contribution

The paper presents eSTA, a novel analytical correction method that extends shortcut to adiabaticity protocols to complex, previously intractable quantum systems.

Findings

Effective correction for atomic state manipulation beyond RWA

Improved transport of neutral atoms in Gaussian traps

Enhanced ion transport in anharmonic traps

Abstract

Fast and robust quantum control protocols are often based on an idealised approximate description of the relevant quantum system. While this may provide a performance which is close to optimal, improvements can be made by incorporating elements of the full system representation. We propose a new technique for such scenarios, called enhanced shortcuts to adiabaticity (eSTA). The eSTA method works for previously intractable Hamiltonians by providing an analytical correction to existing STA protocols. This correction can be easily calculated and the resulting protocols are outside the class of STA schemes. We demonstrate the effectiveness of the method for three distinct cases: manipulation of an internal atomic state beyond the rotating wave approximation, transport of a neutral atom in an optical Gaussian trap and transport of two trapped ions in an anharmonic trap.