Quantum entanglement, a phenomenon where particles become interconnected regardless of distance, is at the heart of emerging quantum networks. Researchers at the National Institute of Standards and Technology (NIST) have demonstrated a method to entangle photons across distant, synchronized quantum-networked nodes. By employing the "White Rabbit" time transfer system, they achieved synchronization within four picoseconds, facilitating photon entanglement with over 90% probability. This breakthrough not only advances quantum communication but also shows that quantum and classical signals can coexist on the same fiber-optic infrastructure. nist.gov
Similarly, scientists at Oak Ridge National Laboratory have developed a quantum chip that integrates key photonic capabilities on a single platform. This innovation brings quantum networking closer to reality by enabling the combination of essential quantum elements, such as qubits and entangled photons, on a single chip. The study, published in Optica Quantum, marks a significant step toward scalable quantum communication systems. ornl.gov
The integration of quantum and classical signals on the same fiber-optic infrastructure, as demonstrated by NIST researchers, could lead to more efficient and secure communication systems, benefiting sectors like finance, healthcare, and national security.