Distribution of genuine high-dimensional entanglement over 10.2 km of noisy metropolitan atmosphere

• Autoři: BULLA Lukas; HJORTH Kristian; KOHOUT Oskar; LANG Jan; ECKER Sebastian; NEUMANN Sebastian; BITTERMANN Julius; KINDLER Robert; HUBER Marcus; BOHMANN Martin; URSIN Rupert; PIVOLUSKA Matej
• Rok publikování: 2023
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: PHYSICAL REVIEW A
• Fakulta / Pracoviště MU: Ústav výpočetní techniky
• www: https://doi.org/10.1103/PhysRevA.107.L050402
• Doi: http://dx.doi.org/10.1103/PhysRevA.107.L050402
• Klíčová slova: non-locality; entanglement; high-dimensional quantum states
• Popis: Our study investigates the presence of high-dimensional entanglement in a recent demonstration of a noise-resistant quantum key distribution (QKD) protocol presented in [Phys. Rev. X 13, 021001 (2023)]. We determined that it is possible to certify the dimensionality of the distributed entangled states to be at least three. To demonstrate this, we developed an energy-time entanglement discretization technique, as well as an improved witness for entanglement dimensionality. Our results provide insight into the complex relationship between high-dimensional entanglement and the noise resistance of QKD protocols operating in high dimensions.

Související projekty

• Development of algorithms for application of quantum computers in electronic-structure calculations in solid-state physics and chemistry