sky map
Quantum Convolutional Neural Networks for the detection of Gamma-Ray Bursts in the AGILE space mission data
Rizzo, A., Parmiggiani, N., Bulgarelli, A., Macaluso, A., Fioretti, V., Castaldini, L., Di Piano, A., Panebianco, G., Pittori, C., Tavani, M., Sartori, C., Burigana, C., Cardone, V., Farsian, F., Meneghetti, M., Murante, G., Scaramella, R., Schillirò, F., Testa, V., Trombetti, T.
Quantum computing represents a cutting-edge frontier in artificial intelligence. It makes use of hybrid quantum-classical computation which tries to leverage quantum mechanic principles that allow us to use a different approach to deep learning classification problems. The work presented here falls within the context of the AGILE space mission, launched in 2007 by the Italian Space Agency. We implement different Quantum Convolutional Neural Networks (QCNN) that analyze data acquired by the instruments onboard AGILE to detect Gamma-Ray Bursts from sky maps or light curves. We use several frameworks such as TensorFlow-Quantum, Qiskit and Penny-Lane to simulate a quantum computer. We achieved an accuracy of 95.1% on sky maps with QCNNs, while the classical counterpart achieved 98.8% on the same data, using however hundreds of thousands more parameters.
Cosmic Microwave Background Recovery: A Graph-Based Bayesian Convolutional Network Approach
Adams, Jadie, Lu, Steven, Gorski, Krzysztof M., Rocha, Graca, Wagstaff, Kiri L.
The cosmic microwave background (CMB) is a significant source of knowledge about the origin and evolution of our universe. However, observations of the CMB are contaminated by foreground emissions, obscuring the CMB signal and reducing its efficacy in constraining cosmological parameters. We employ deep learning as a data-driven approach to CMB cleaning from multi-frequency full-sky maps. In particular, we develop a graph-based Bayesian convolutional neural network based on the U-Net architecture that predicts cleaned CMB with pixel-wise uncertainty estimates. We demonstrate the potential of this technique on realistic simulated data based on the Planck mission. We show that our model accurately recovers the cleaned CMB sky map and resulting angular power spectrum while identifying regions of uncertainty. Finally, we discuss the current challenges and the path forward for deploying our model for CMB recovery on real observations.