Spin Squeezing in Electron Microscopy

TL;DR

This paper proposes using spin squeezing, a quantum entanglement technique, to enhance the signal-to-noise ratio in electron microscopy beyond classical shot-noise limits, by theoretically analyzing entanglement generation methods.

Contribution

It introduces a theoretical framework for applying spin squeezing in electron microscopy to surpass shot-noise limitations, linking quantum metrology with electron interferometry.

Findings

Spin squeezing can theoretically improve electron microscopy SNR.

Entangled states can be generated via Coulomb interactions and quantum non-demolition measurements.

Potential to achieve shot-noise limited imaging with quantum-enhanced techniques.

Abstract

Quantum metrology experiments in atomic physics and quantum optics have demonstrated measurement accuracy beyond the shot-noise limit via multi-particle entanglement. At the same time, electron microscopy, an essential tool for high-resolution imaging of biological systems, is severely constrained in its signal-to-noise ratio (SNR) by shot noise, due to the dose limit imposed by electron beam-induced damage. Here, we show theoretically that spin squeezing, a form of quantum metrology based on entanglement, is a natural fit for improving the SNR in electron microscopy. We investigate the generation of the necessary entangled states through electron-electron Coulomb interactions and quantum non-demolition measurements. Our results connect the fields of quantum metrology and electron interferometry, paving the way toward electron microscopy with SNR beyond the shot-noise limit.