Reduced coupling with global pulses in quantum registers

TL;DR

This paper demonstrates that global pulses can effectively reduce Ising coupling in quantum registers, extending decoupling techniques beyond traditional selective control methods, with complexity independent of system size.

Contribution

It introduces a novel decoupling approach using global pulses to diminish Ising coupling, challenging the belief that such control is limited to specific coupling types.

Findings

Global pulses can reduce Ising coupling strength.

Decoupling complexity is independent of system size.

Method extends decoupling capabilities beyond traditional selective controls.

Abstract

Decoupling is an important tool to prolong the coherence time of quantum systems. Most decoupling schemes have been assuming selective controls on the system and it is believed that with global pulses one can only decouple systems with certain coupling terms like secular dipole-dipole coupling. In this article we show that with global pulses it is possible to reduce the coupling strength of other types of coupling, which we demonstrate with Ising coupling. The complexity of such pulses is independent of the size of system.