Atomic clock accuracy needed
1994; Institute of Electrical and Electronics Engineers; Volume: 13; Issue: 2 Linguagem: Inglês
10.1109/45.283880
ISSN1558-1772
Autores Tópico(s)Cold Atom Physics and Bose-Einstein Condensates
ResumoThe National Institute of Standards and Technology (NIST), formerly The National Bureau of Standards, has been working with atomic clocks for over forty years. They have come a long way since they developed the world's first atomic clock. NIST has also introduced NIST-7, one of the most accurate clocks to date and is expected, after full evaluation, to show an accuracy of one part in 10/sup 14/, equivalent to one second in three million years. Atomic clocks are based on natural resonances in atoms, which involve highly stable and periodic events at very high frequencies. >
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