# Quantum Computing Group

## Quantum Telescope

This project for DOE High Energy Physics is focused on the development of next-generation telescopes based on exploiting quantum information science and quantum optics by leveraging quantum interferometric techniques. The development of such telescopes would have transformative effects on the fields of astronomy and cosmology as stars, galaxies, and other celestial objects that previously were not detectable will become observable with this new technology.

CSI’s contribution to this project is on the study of multipartite entanglement, particularly measurements that can diagnose specific patterns of multipartite entanglement, classification of such patterns of entanglement, and leveraging these entanglement patterns to develop novel forms of quantum interferometry.

Work in this direction has involved the development of entanglement witnesses for few-qubit entangled states using support vector machine technology from machine learning; classification of holographic entanglement entropy using techniques from convex optimization; development of new measures of multipartite entanglement, such as the multipartite reflected entropy and multipartite entanglement of purification; studying quantum error correction properties of specific quantum error correcting codes, particularly those amenable to storage and processing of multipartite quantum information; and examining the robustness properties of such quantum error correcting codes to multipartite quantum error.

By using these effects, properties of celestial bodies that were undetectable even via simple quantum astrometric approaches to telescopy could become observable, furthering the reach of these types of telescopes for understanding the stars.