Entangling Nuclear Spins by Dissipation in a Solid-state System

TL;DR

This paper demonstrates how engineered dissipation can be used to reliably entangle two nuclear spins in a solid-state system, showcasing a new method for quantum state preparation that leverages environmental interactions.

Contribution

The study introduces a novel approach to generate entanglement through engineered dissipation in a nitrogen-vacancy system, advancing quantum information processing techniques.

Findings

Successful entanglement of two $^{13}$C nuclear spins via engineered dissipation

Deterministic entanglement independent of initial states

Utilization of electron spin as an ancilla for dissipation control

Abstract

Entanglement is a fascinating feature of quantum mechanics and a key ingredient in most quantum information processing tasks. Yet the generation of entanglement is usually hampered by undesired dissipation owing to the inevitable coupling of a system with its environment. Here, we report an experiment on how to entangle two $^{13}$C nuclear spins via engineered dissipation in a nitrogen-vacancy system. We utilize the electron spin as an ancilla, and combine unitary processes together with optical pumping of the ancilla to implement the engineered dissipation and deterministically produce an entangled state of the two nuclear spins, independent of their initial states. Our experiment demonstrates the power of engineered dissipation as a tool for generation of multi-qubit entanglement in solid-state systems.