Development makes secure network that is theoretically impossible to intercept or crack China is to start construction on a quantum communication line between Wuhan, capital of Hubei province, and Hefei, the Anhui provincial capital, bringing the nation a step closer to having the world's most secure communication network.
Encryption is critical in many aspects of modern life, however, perfectly secure communication can only be achieved using the strong correlations, or entanglement, between quantum objects. Quantum key distribution (QKD) makes it possible for two distant users to share a key with unconditional security.
Spin-orbit coupling is one of the fundamental effects in quantum physics. It plays a vital role in many basic physic phenomena and exotic quantum states. These phenomena led to the foundation of several important research fields in condensed-matter physics like spintronics, topological insulator and topological superconductor. However, due to common problem of uncontrollable complex environment, many researches of solid materials of exotic physics become extremely difficult. This remains a major challenge for many relevant researches.
Quantum teleportation faithfully transfers a quantum state between distant nodes in a network, which enables revolutionary information-processing applications. However, in the past not a single quantum-teleportation experiment has been realized with independent quantum sources, entanglement distribution prior to the Bell-state measurement (BSM) and feedforward operation simultaneously, even in the laboratory environment.
The satellite is set to launch from Jiuquan Satellite launch Center later this month, and if initial experiments in this two-year mission prove successful, it could soon be followed by a fleet of others, according to Nature.The researchers are working to prove that particles can remain entangled across great distances – in this case, nearly 750 miles.Earlier efforts to demonstrate quantum communication have shown this can be up to just over 180 miles, and scientists now hoping that transmitting the photons through space will push this even farther.
The team lead by PAN Jianwei and BAO Xiaohui from University of Science and Technology of China has developed a high-performance light-matter interface, which fulfills a quantum repeater with both an efficiency and a lifetime for the first time. This work will have significant applications in the long-distance quantum communication in the near future.
LU Chaoyang and PAN Jianwei group from USTC realized the first single-photon source that combines near perfect single-photon purity, indistinguishability and high extraction efficiency, opening the way to scalable multi photon quantum information experiment with solid-state platforms. On January, the study was published in Physical Review Letters and briefly introduced by American Physical Society Site.
The Physics World 2015 Breakthrough of the Year goes to Jian-Wei Pan and Chaoyang Lu of the University of Science and Technology of China in Hefei, for being the first to achieve the simultaneous quantum teleportation of two inherent properties of a fundamental particle – the photon. Nine other achievements are highly commended and cover topics ranging from astronomy to medical physics