Accelerating Quantum Emitter Characterization with Latent Neural Ordinary Differential Equations

TL;DR

This paper introduces a neural ODE model that predicts complete, noise-free photon correlation data from limited noisy measurements, significantly speeding up quantum emitter characterization.

Contribution

The authors develop a latent neural ODE approach to forecast full interferograms from sparse noisy data, reducing experimental time by up to 20 times.

Findings

Achieved up to 20-fold reduction in measurement time.

Successfully reconstructed noise-free interferograms from limited data.

Demonstrated applicability to quantum emitter material analysis.

Abstract

Deep neural network models can be used to learn complex dynamics from data and reconstruct sparse or noisy signals, thereby accelerating and augmenting experimental measurements. Evaluating the quantum optical properties of solid-state single-photon emitters is a time-consuming task that typically requires interferometric photon correlation experiments, such as Photon correlation Fourier spectroscopy (PCFS) which measures time-resolved single emitter lineshapes. Here, we demonstrate a latent neural ordinary differential equation model that can forecast a complete and noise-free PCFS experiment from a small subset of noisy correlation functions. By encoding measured photon correlations into an initial value problem, the NODE can be propagated to an arbitrary number of interferometer delay times. We demonstrate this with 10 noisy photon correlation functions that are used to extrapolate an entire de-noised interferograms of up to 200 stage positions, enabling up to a 20-fold speedup in experimental acquisition time from $\sim$3 hours to 10 minutes. Our work presents a new approach to greatly accelerate the experimental characterization of novel quantum emitter materials using deep learning.