Light does the twist for quantum computing: Twisting light that switches direction at room temperature could be the future of quantum information processing

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Scientists have generated circularly polarized light and controlled its direction without using clunky magnets or very low temperatures. The findings show promise for the development of materials and device methods that can be used in optical quantum information processing.
Scientists have generated circularly polarized light and controlled its direction without using clunky magnets or very low temperatures. The findings, by Nagoya University researchers and colleagues in Japan, and published in the journal Advanced Materials, show promise for the development of materials and device methods that can be used in optical quantum information processing.

Light particles called photons have interesting properties that can be exploited for storing and transporting data, and show tremendous promise for use in quantum computing.

For this to happen, information is first stored in electrons that then interact with matter to generate data-carrying photons. Information can be encoded in the direction of an electron's spin, just as it is stored in the form of 0 and 1 in the 'bits' of computers . Data can also be stored when electrons occupy 'valleys' found in the energy bands they move between while they orbit an atom. When these electrons interact with…
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