Accelerating Quantum Emitter Characterization with Latent Neural Ordinary Differential Equations
This work accelerates the characterization of novel quantum emitter materials for researchers in quantum optics and materials science, though it is incremental as it applies a known deep learning method to a specific experimental bottleneck.
The paper tackled the time-consuming task of evaluating quantum optical properties of solid-state single-photon emitters by using a latent neural ordinary differential equation model to forecast complete and noise-free interferograms from a small subset of noisy correlation functions, achieving up to a 20-fold speedup in experimental acquisition time from about 3 hours to 10 minutes.
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.