Most accurate clock in the world.

National Institute of Standards and Technology (NIST) created the most accurate clock in the world: they are based on an innovative method for quantum spectroscopy atom of aluminum-27. The technology allows to capture the transitions between the levels of the quantum state of an atom with a frequency 8,6-18, that is, those hours do not exceed the per-second error for at least 3.7 billion years.

They are more than two times more accurate than the previous version of the most accurate clock, designed by the same group of scientists and a half years ago.

The new record has an error of less than the standard second, that is, in a sense, these hours rather than time itself. One second standard SI equals 9,192,631,770 periods of the radiation of an atom of cesium-137. With the advent of the new hours can be adjusted and this, and other fundamental constants.

The study has a particular practical value. For example, global positioning system, the more accurate the clock on the satellite GPS, the more precise the navigation works. In a press release, NIST reported that the accuracy of the new hours will allow even put the planes on the signals of GPS.

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