Dark state adiabatic passage with branched networks and high-spin systems: spin separation and entanglement

TL;DR

This paper extends dark state adiabatic passage protocols to branched spin networks, enabling robust quantum transport and entanglement generation among spin systems, with potential applications in quantum information processing.

Contribution

It introduces a method for transporting and entangling spins in branched networks using adiabatic passage, enhancing robustness and scalability in quantum systems.

Findings

Maximal entanglement achieved in spin-half systems.

Effective transport of spin states across branched networks.

Robustness of adiabatic methods against noise.

Abstract

Adiabatic methods are potentially important for quantum information protocols because of their robustness against many sources of technical and fundamental noise. They are particularly useful for quantum transport, and in some cases elementary quantum gates. Here we explore the extension of a particular protocol, dark state adiabatic passage, where a spin state is transported across a branched network of initialised spins, comprising one `input' spin, and multiple leaf spins. We find that maximal entanglement is generated in systems of spin-half particles, or where the system is limited to one excitation.