Invention Reference Number
This invention addresses a key challenge in quantum communication networks by developing a controlled-NOT (CNOT) gate that operates between two degrees of freedom (DoFs) within a single photon: polarization and frequency. Photonic hyperentanglement, or the simultaneous entanglement across multiple DoFs, has the potential to significantly increase information capacity and enhance noise resilience in quantum networks. However, the lack of controlled operations between these DoFs has limited its practical applications.
Our invention provides a solution by enabling high-fidelity quantum operations between polarization and frequency DoFs using a novel CNOT gate design. This development paves the way for advanced quantum communication protocols, such as hyperentanglement-assisted entanglement distillation, which can improve the quality of quantum information transmitted over fiber-optic networks. The approach holds promise for enhancing the scalability and efficiency of quantum networks as they evolve toward real-world deployment.
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
