Robustness of energy landscape control for spin networks under decoherence

TL;DR

This paper investigates how decoherence affects the robustness of energy landscape control in quantum spin networks, finding that some controllers remain effective despite pure dephasing.

Contribution

It introduces an analysis of decoherence effects on energy landscape control robustness, highlighting the potential for effective control without precise decoherence knowledge.

Findings

Decoherence reduces control effectiveness but some controllers remain robust.

Certain controllers maintain high performance despite pure dephasing.

Robust control strategies can be identified without exact decoherence modeling.

Abstract

Quantum spin networks form a generic system to describe a range of quantum devices for quantum information processing and sensing applications. Understanding how to control them is essential to achieve devices with practical functionalities. Energy landscape shaping is a novel control paradigm to achieve selective transfer of excitations in a spin network with surprisingly strong robustness towards uncertainties in the Hamiltonians. Here we study the effect of decoherence, specifically generic pure dephasing, on the robustness of these controllers. Results indicate that while the effectiveness of the controllers is reduced by decoherence, certain controllers remain sufficiently effective, indicating potential to find highly effective controllers without exact knowledge of the decoherence processes.