Scalable Spin Amplification with a Gain over a Hundred

TL;DR

This paper introduces a scalable spin amplification method achieving a gain over 100 in a solid-state nuclear spin system, enhancing single-spin detection and NMR sensitivity for tiny samples.

Contribution

It presents a practical, scalable spin amplification technique that does not require individual spin addressing or specialized networks, demonstrated with a gain of 140.

Findings

Achieved a spin gain of 140 in solid-state nuclear spins

Increased spin polarization to 0.12 via dynamic nuclear polarization

Enables single-spin measurement and improved NMR for small samples

Abstract

We propose a scalable and practical implementation of spin amplification which does not require individual addressing nor a specially tailored spin network. We have demonstrated a gain of 140 in a solid-state nuclear spin system of which the spin polarization has been increased to 0.12 using dynamic nuclear polarization with photoexcited triplet electron spins. Spin amplification scalable to a higher gain opens the door to the single spin measurement for a readout of quantum computers as well as practical applications of nuclear magnetic resonance (NMR) spectroscopy to infinitesimal samples which have been concealed by thermal noise.