Quantum Entanglement-Based Free-Space Quantum Communication Demonstration

completed

India achieved a major breakthrough in quantum communication technology by demonstrating quantum entanglement-based secure communication over more than one kilometer of free space. The experiment was conducted on the IIT Delhi campus by scientists from DRDO and IIT Delhi, achieving a secure key rate of nearly 240 bits per second with a quantum bit error rate below 7%. This advancement positions India among the leading nations in quantum communication research and offers advantages over fiber-optic quantum networks by eliminating the need for expensive underground infrastructure.