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https://hdl.handle.net/2440/101093
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Type: | Journal article |
Title: | Quantum projection noise in an atomic fountain: a high stability cesium frequency standard |
Author: | Santarelli, G. Laurent, P. Lemonde, P. Clairon, A. Mann, A.G. Chang, S. Luiten, A.N. Salomon, C. |
Citation: | Physical Review Letters, 1999; 82(23):4619-4622 |
Publisher: | American Physical Society |
Issue Date: | 1999 |
ISSN: | 0031-9007 1079-7114 |
Statement of Responsibility: | G. Santarelli, Ph. Laurent, P. Lemonde, and A. Clairon, A. G. Mann, S. Chang, and A. N. Luiten, C. Salomon |
Abstract: | We describe the operation of a laser cooled cesium fountain clock in the quantum limited regime. An ultrastable cryogenic sapphire oscillator is used to measure the short-term frequency stability of the fountain as a function of the number of detected atoms Nat. For Nat varying from 4 × 104 to 6 × 105 the Allan standard deviation of the frequency fluctuations is in excellent agreement with the Nat-1/2 law of atomic projection noise. With 6 × 105 atoms, the relative frequency stability is 4 × 10-14τ-1/2where Τ is the integration time in seconds. This is the best short-term stability ever reported for primary frequency standards, a factor of 5 improvement over previous results. © 1999 The American Physical Society. |
Rights: | © 1999 The American Physical Society |
DOI: | 10.1103/PhysRevLett.82.4619 |
Published version: | http://dx.doi.org/10.1103/physrevlett.82.4619 |
Appears in Collections: | Aurora harvest 7 IPAS publications |
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