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      • Date:2016-5-17
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      Lawrence Berkeley National Laboratory and the University of California at Berkeley scientists in the "Physical Review Letters" magazine wrote that they have devised a novel properties not found in nature "quantum metamaterials", which is composed of light artificial crystal and trapped ultracold atoms, in many respects similar crystals, but the structure is more "perfect", there is no common defects in the natural material.

      The researchers say they can accurately locate the position or within such optical crystal "probe" atoms, and using another laser (near infrared) to tune its behavior so that the atoms in the form of photons needed to release energy; in turn, this is another atomic probe atom (in the same or a different crystal lattice) absorption, thereby forming a simple exchange of information.


      Who led the study at Berkeley Lab's Materials Sciences Division Mr. Zhang Xiang (transliteration), said: "Enhancing and super fast control of the release of the single photon quantum technologies, especially the core of quantum information processing, the previous program can only do to the point where, while taking into account our program can "lead author Pankaj · Jiaha season, said:" the new method allows us to control the rate of release of photons, therefore, can more quickly and efficiently process and transmit information optically . "


      The latest program is expected to release the probe atom photon rate from (one billionth of a second) to accelerate nanosecond picosecond (trillionth of a second), and more importantly, the process is a "lossless "which means that the photon does not lose energy like that in traditional materials, overcoming one of the obstacles to the realization of quantum computing and information processing faces. Quick release and low-loss transmission of photons between atoms photons are quantum computation information processing crucial step.


      The researchers found that rubidium atoms is very suitable for the study, but barium, calcium and cesium atoms can also be implanted into an artificial crystal. Although artificial crystals obtained is one-dimensional, but may also use this method to create a two-dimensional, three-dimensional quantum metamaterial crystal structure.



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      澳门皇冠贵宾会如何下载