Authors: George Rajna
Scientists in Australia have for the first time demonstrated the protection of correlated states between paired photons—packets of light energy—using the intriguing physical concept of topology.  A team of scientists, led by Professor Winfried Hensinger at the University of Sussex, have made a major breakthrough concerning one of the biggest problems facing quantum computing: how to reduce the disruptive effects of environmental "noise" on the highly sensitive function of a large-scale quantum computer.  Watch a movie backwards and you'll likely get confused—but a quantum computer wouldn't.  Calculations of a quantum system's behavior can spiral out of control when they involve more than a handful of particles.  Researchers from the University of North Carolina at Chapel Hill have reached a new milestone on the way to optical computing, or the use of light instead of electricity for computing.  The key technical novelty of this work is the creation of semantic embeddings out of structured event data.  The researchers have focussed on a complex quantum property known as entanglement, which is a vital ingredient in the quest to protect sensitive data.  Cryptography is a science of data encryption providing its confidentiality and integrity.  Researchers at the University of Sheffield have solved a key puzzle in quantum physics that could help to make data transfer totally secure.  "The realization of such all-optical single-photon devices will be a large step towards deterministic multi-mode entanglement generation as well as high-fidelity photonic quantum gates that are crucial for all-optical quantum information processing," says Tanji-Suzuki. 
Comments: 65 Pages.
[v1] 2018-11-01 13:19:13
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