Laser-cooled Cs frequency standard and a measurement of the frequency shift due to ultracold collisions

Kurt Gibble, Steven Chu

Research output: Contribution to journalArticle

206 Citations (Scopus)

Abstract

We demonstate a laser-cooled Cs fountain which can be used as a frequency standard. The fountain has been used to measure the frequency shift due to ultracold Cs-Cs collisions at temperatures below 2.8 μK. The measured shift is -12.9±0.7 mHz for a density of (2.7±1.5)×109 cm-3 beginning with an even distribution (±10%) among the F=3, mF states. For a fountain with 95% of the atoms in the mF=0 states, we measure a frequency shift of -5.5±0.5 mHz at a density of (3.5±2.0)×108 cm-3.

Original languageEnglish (US)
Pages (from-to)1771-1774
Number of pages4
JournalPhysical Review Letters
Volume70
Issue number12
DOIs
StatePublished - Jan 1 1993

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frequency standards
frequency shift
collisions
lasers
shift
atoms
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Laser-cooled Cs frequency standard and a measurement of the frequency shift due to ultracold collisions",
abstract = "We demonstate a laser-cooled Cs fountain which can be used as a frequency standard. The fountain has been used to measure the frequency shift due to ultracold Cs-Cs collisions at temperatures below 2.8 μK. The measured shift is -12.9±0.7 mHz for a density of (2.7±1.5)×109 cm-3 beginning with an even distribution (±10{\%}) among the F=3, mF states. For a fountain with 95{\%} of the atoms in the mF=0 states, we measure a frequency shift of -5.5±0.5 mHz at a density of (3.5±2.0)×108 cm-3.",
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Laser-cooled Cs frequency standard and a measurement of the frequency shift due to ultracold collisions. / Gibble, Kurt; Chu, Steven.

In: Physical Review Letters, Vol. 70, No. 12, 01.01.1993, p. 1771-1774.

Research output: Contribution to journalArticle

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