Implementing quantum logic gates with GRAPE: principles and practicalities

TL;DR

This paper discusses the use of GRAPE pulses to implement quantum logic gates in NMR quantum computers, addressing both fundamental principles and practical challenges encountered in real-world applications.

Contribution

It introduces extensions to the GRAPE technique for quantum gate implementation and analyzes practical difficulties in experimental settings.

Findings

GRAPE pulses effectively implement quantum gates in NMR systems

Extensions improve the robustness of quantum gate sequences

Practical challenges include non-idealities in experimental setups

Abstract

We briefly describe the use of GRAPE pulses to implement quantum logic gates in NMR quantum computers, and discuss a range of simple extensions to the core technique. We then consider a range of difficulties which can arise in practical implementations of GRAPE sequences, reflecting non-idealities in the experimental systems used.