Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/95714
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dc.contributor.author | Truong, G. | - |
dc.contributor.author | Anstie, J. | - |
dc.contributor.author | May, E. | - |
dc.contributor.author | Stace, T. | - |
dc.contributor.author | Luiten, A. | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Nature Communications, 2015; 6(1):8345-1-8345-6 | - |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.uri | http://hdl.handle.net/2440/95714 | - |
dc.description.abstract | Spectroscopy has an illustrious history delivering serendipitous discoveries and providing a stringent testbed for new physical predictions, including applications from trace materials detection, to understanding the atmospheres of stars and planets, and even constraining cosmological models. Reaching fundamental-noise limits permits optimal extraction of spectroscopic information from an absorption measurement. Here, we demonstrate a quantum-limited spectrometer that delivers high-precision measurements of the absorption lineshape. These measurements yield a very accurate measurement of the excited-state (6P1/2) hyperfine splitting in Cs, and reveals a breakdown in the well-known Voigt spectral profile. We develop a theoretical model that accounts for this breakdown, explaining the observations to within the shot-noise limit. Our model enables us to infer the thermal velocity dispersion of the Cs vapour with an uncertainty of 35 p.p.m. within an hour. This allows us to determine a value for Boltzmann's constant with a precision of 6 p.p.m., and an uncertainty of 71 p.p.m. | - |
dc.description.statementofresponsibility | G.-W. Truong, J.D. Anstie, E.F. May, T.M. Stace and A.N. Luiten | - |
dc.language.iso | en | - |
dc.publisher | Nature Publishing Group | - |
dc.rights | © 2015 Macmillan Publishers Limited. All rights reserved. | - |
dc.source.uri | http://dx.doi.org/10.1038/ncomms9345 | - |
dc.title | Accurate lineshape spectroscopy and the Boltzmann constant | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1038/ncomms9345 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/CE1101013 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/FT0991631 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP1094500 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Luiten, A. [0000-0001-5284-7244] | - |
Appears in Collections: | Aurora harvest 3 IPAS publications |
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