PIRSA:14060011 Conference

DOI10.48660/14060011

Conference/School: New ideas in low-energy tests of fundamental physics

Sherman, J. (2014). Time and frequency metrology at NIST. Perimeter Institute. https://pirsa.org/14060011

Sherman, Jeff. Time and frequency metrology at NIST. Perimeter Institute, Jun. 16, 2014, https://pirsa.org/14060011 

@misc{ pirsa_PIRSA:14060011,
  doi = {10.48660/14060011},
  url = {https://pirsa.org/14060011},
  author = {Sherman, Jeff},
  keywords = {},
  language = {en},
  title = {Time and frequency metrology at NIST},
  publisher = {Perimeter Institute},
  year = {2014},
  month = {jun},
  note = {PIRSA:14060011 see, \url{https://pirsa.org}}
}

Abstract

Official U.S. time is currently realized by an ensemble of commercial cesium-beam atomic clocks and hydrogen masers. Cesium-fountain devices presently serve as ultimate frequency references and help to define the SI second. The present quandary is: these microwave-based standards are rapidly becoming outmatched by new optical atomic frequency references---by a factor of 1,000 in stability, and perhaps a factor of 100 in accuracy. I will survey the ongoing optical atomic clock projects at NIST and highlight related work in optical time and frequency measurement and transfer.

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