India, June 17 -- India has successfully demonstrated an experimental advancement in quantum communication that paves the way for real-time applications in quantum cyber security, according to the defence ministry. "The free-space quantum secure communication using quantum entanglement over a distance of more than one km was achieved via a free-space optical link established on the IIT-Delhi campus," it said in a statement on Monday. With this, India has entered a "new quantum era", officials said. Defence minister Rajnath Singh congratulated DRDO and IIT-Delhi. HTC...