Phys.org December 19, 2024
For quantum computers the property called “magic” is critical. An international team of researchers (UK, Australia) considered the property of magic, which distinguished the quantum states leading to a genuine computational advantage over classical states when used in algorithms. They examined top-antitop pair production at the LHC produced magic tops, where the amount of magic varied with the kinematics of the final state. They compared results for individual partonic channels and at proton level. They showed that averaging over final states typically increased magic which contrasted with entanglement measures, such as the concurrence, which typically decreased. Some entanglement measures have a nonzero threshold for entanglement, but there was no such nonzero threshold for magic. According to the researchers their results create new links between quantum information and particle physics literature, providing practical insights for further study… read more. Open Access TECHNICAL ARTICLE
The magic of a mixed top-antitop final state in (a) the qq channel and (b) the gg channel. Credit: Physical Review, D 110, 116016, 18 December, 2024