Coherent control of two nuclear spins using the anisotropic hyperfine interaction

TL;DR

This paper demonstrates the coherent control of two nuclear spins via hyperfine interaction with an electron spin, creating nuclear coherence and discussing implications for quantum information processing.

Contribution

It introduces a method for controlling two nuclear spins through anisotropic hyperfine interaction and explores the creation of nuclear coherence from thermal states.

Findings

Successful creation of double nuclear coherence

Identification of challenges for high-fidelity quantum gates

Potential pathways for quantum information applications

Abstract

We demonstrate coherent control of two nuclear spins mediated by the magnetic resonance of a hyperfine-coupled electron spin. This control is used to create a double nuclear coherence in one of the two electron spin manifolds, starting from an initial thermal state, in direct analogy to the creation of an entangled (Bell) state from an initially pure unentangled state. We identify challenges and potential solutions to obtaining experimental gate fidelities useful for quantum information processing in this type of system.