Phys.org October 17, 2020 Modern beam shaping techniques have enabled the generation of optical fields displaying a wealth of structural features. Due to their robustness against external perturbations, topological invariants in physical systems are increasingly being considered to encode information. Hence, structured light with topological properties could potentially be used for such purposes. An international team of researchers (Canada, USA – MIT, Israel) has experimentally demonstrated structures known as framed knots within optical polarization fields. They developed a protocol in which the topological properties of framed knots are used in conjunction with prime factorization to encode information…read more. Open Access […]
Tag Archives: Quantum computation
A sound idea: a step towards quantum computing
Science Daily June 19, 2019 An international team of researchers (Japan, USA – University of Pittsburgh) used very short laser pulses to excite electrons inside a silicon crystal creating coherent vibrations of the silicon structure, such that the motions of the electron and the silicon atoms became entangled. The state of the system was then probed after a variable delay time with a second laser pulse. Based on their theoretical model, the scientists were able to explain oscillations observed in the charge generated as a function of delay time. The research may lead to quantum computers based on existing silicon […]
Scientists ‘teleport’ a quantum gate
Science Daily September 5, 2018 Modularity is used in constructing a large-scale quantum processor because of the errors and noise that are inherent in real-world quantum systems. An essential tool for universal quantum computation is the teleportation of an entangling quantum gate. Researchers at Yale University demonstrated the teleportation of a controlled-NOT (CNOT) gate, took a crucial step towards implementing robust, error-correctable modules by enacting the gate between two logical qubits, encoding quantum information redundantly. By using such an error-correctable encoding, their teleported gate achieves a process fidelity of 79 per cent. Teleported gates have implications for fault-tolerant quantum computation, […]
Light controls two-atom quantum computation
Nanowerk February 7, 2018 In the new concept for quantum gate demonstrated by researchers in Germany, photons impinging on an optical cavity mediate an interaction between two atoms trapped inside. This interaction is the basis for performing characteristic gate operations between the atoms. The gate operations take place within microseconds and the gate mechanism can be applied to other experimental platforms, and the two-atom gate can serve as a building block in a quantum repeater… read more. Open Access TECHNICAL ARTICLE