Phys.org August 13, 2021
A promising and potentially scalable hardware platforms and computational protocols is to combine a photonic platform with measurement-induced quantum information processing. Gate operations can be implemented through optical measurements on a cluster state. Researchers in Denmark designed and demonstrated the deterministic implementation of a multi-mode set of measurement-induced quantum gates in a large two-dimensional optical cluster state using phase-controlled continuous-variable quadrature measurements. Each gate is programmed into the phases of high-efficiency quadrature measurements, which execute the transformations by teleportation through the cluster state. They executed a small quantum circuit consisting of 10 single-mode gates and 2 two-mode gates on a three-mode input state. According to the researchers, fault-tolerant universal quantum computing is possible with this platform if the cluster-state entanglement is improved and a supply of states with Gottesman–Kitaev–Preskill encoding is available…read more. Open Access TECHNICAL ARTICLE 1 , 2
Experimental set and computation scheme. Credit: Nature Physics (2021)Â