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Precision measurements of the gradient of the Casimir force between ultraclean metallic surfaces at larger separations

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dc.contributor.author Liu M.
dc.contributor.author Xu J.
dc.contributor.author Klimchitskaya G.
dc.contributor.author Mostepanenko V.
dc.contributor.author Mohideen U.
dc.date.accessioned 2020-01-15T22:13:42Z
dc.date.available 2020-01-15T22:13:42Z
dc.date.issued 2019
dc.identifier.issn 2469-9926
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/157191
dc.description.abstract © 2019 American Physical Society. We report precision measurements of the Casimir interaction at larger separation distances between the Au-coated surfaces of a sphere and a plate in ultrahigh vacuum using a much softer cantilever of the dynamic atomic-force-microscope-based setup and two-step cleaning procedure of the vacuum chamber and test body surfaces by means of UV light and Ar-ion bombardment. Compared to the previously performed experiment, two more measurement sets for the gradient of the Casimir force are provided, which confirmed and slightly improved the results. Next, additional measurements have been performed with a factor-of-two larger oscillation amplitude of the cantilever. This allowed the obtainment of meaningful results at much larger separation distances. The comparison of the measurement data with theoretical predictions of the Lifshitz theory using the dissipative Drude model to describe the response of Au to the low-frequency electromagnetic field fluctuations shows that this theoretical approach is experimentally excluded over the distances from 250 to 1100 nm (i.e., a major step forward compared to the previous work where it was excluded up to only 820 nm). The theoretical approach using the dissipationless plasma model at low frequencies is shown to be consistent with the data over the entire measurement range from 250 to 1300 nm. The possibilities to explain these puzzling results are discussed.
dc.relation.ispartofseries Physical Review A
dc.title Precision measurements of the gradient of the Casimir force between ultraclean metallic surfaces at larger separations
dc.type Article
dc.relation.ispartofseries-issue 5
dc.relation.ispartofseries-volume 100
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS24699926-2019-100-5-SID85075540842


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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