Use of global interactions in efficient quantum circuit constructions

TL;DR

This paper explores how global entangling operators, specifically global Ising gates, can be used to construct more efficient quantum circuits for important algorithms, reducing the number of entangling gates needed.

Contribution

It demonstrates that global operations can significantly decrease entangling gate counts in quantum circuit implementations, offering a new approach to circuit optimization.

Findings

Global Ising gates improve circuit efficiency

Reduced entangling gate count in quantum algorithms

Potential for optimized quantum circuit design

Abstract

In this paper we study the ways to use a global entangling operator to efficiently implement circuitry common to a selection of important quantum algorithms. In particular, we focus on the circuits composed with global Ising entangling gates and arbitrary addressable single-qubit gates. We show that under certain circumstances the use of global operations can substantially improve the entangling gate count.