Optical atomic clocks

Photo atomic clocks represent the current state of the art in modern measurement science. In this paper we provided a detailed review of the development of photocatalytic clocks based on captured single ions and many neutral atoms. Discussed the important technical elements of the optical clock and showed the measurement accuracy and system uncertainty associated with the best watch to date. I will summarize the exciting future prospect of watch application.

Scientists from the US Standard Technical Bureau in Boulder, Colorado recently produced the most accurate watch in the world. This is called "photocatalytic clock", it is made of oscillating laser, and this mechanism is called "comb" and vibration can be calculated with one mercury atom as a reference point. Observations on time and season may be easy, but it is important to maintain a sense of balance. Today 's reading will explain the principle and then enrich it in contrast. Several events, such as birth and death, war and peace, are important. Other people explain the basic emotions such as love and hate, cry and laughter. Still others emphasize basic behavioral styles such as talking, silent, searching and giving up. These events, emotions, and actions are the essence and essence of life, and they are clues.

Photo atomic clocks represent the current state of the art in modern measurement science. In this paper we provided a detailed review of the development of photocatalytic clocks based on captured single ions and many neutral atoms. Discussed the important technical elements of the optical clock and showed the measurement accuracy and system uncertainty associated with the best watch to date. I will summarize the exciting future prospect of watch application.

Our next-generation atomic clocks use visible lasers with an oscillation frequency of approximately 1015 Hz or 10 billion times per second. These "optical atomic clocks" can now be accurate up to 18 decimal places (very fast ... 19th!)! At this level, the watch is very sensitive to small changes in gravity. According to Einstein's general relativity the clock closer to the mass (like the Earth) moves more slowly, and these effects can be measured by comparing the scale scale of the clock at different elevations. The optical clock manufacturing experiment conducted at NIST in 2010 successfully identified the difference between the two clock speeds in line. They were only 33 cm tall. As a general rule, recent developments may indicate differences in tick rates between clocks differing in height by 2 cm.