Zobrazeno 1 - 10
of 45
pro vyhledávání: '"H S, Margolis"'
Autor:
M. Schioppo, J. Kronjäger, A. Silva, R. Ilieva, J. W. Paterson, C. F. A. Baynham, W. Bowden, I. R. Hill, R. Hobson, A. Vianello, M. Dovale-Álvarez, R. A. Williams, G. Marra, H. S. Margolis, A. Amy-Klein, O. Lopez, E. Cantin, H. Álvarez-Martínez, R. Le Targat, P. E. Pottie, N. Quintin, T. Legero, S. Häfner, U. Sterr, R. Schwarz, S. Dörscher, C. Lisdat, S. Koke, A. Kuhl, T. Waterholter, E. Benkler, G. Grosche
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-11 (2022)
Precision measurement plays an important role in frequency metrology and optical communications. Here the authors compare two geographically separate ultrastable lasers at 7 × 10−17 fractional frequency instability over a 2220 km optical fibre lin
Externí odkaz:
https://doaj.org/article/12ee0efe5b874f56afe45fbd668ed888
Autor:
B M Roberts, P Delva, A Al-Masoudi, A Amy-Klein, C Bærentsen, C F A Baynham, E Benkler, S Bilicki, S Bize, W Bowden, J Calvert, V Cambier, E Cantin, E A Curtis, S Dörscher, M Favier, F Frank, P Gill, R M Godun, G Grosche, C Guo, A Hees, I R Hill, R Hobson, N Huntemann, J Kronjäger, S Koke, A Kuhl, R Lange, T Legero, B Lipphardt, C Lisdat, J Lodewyck, O Lopez, H S Margolis, H Álvarez-Martínez, F Meynadier, F Ozimek, E Peik, P-E Pottie, N Quintin, C Sanner, L De Sarlo, M Schioppo, R Schwarz, A Silva, U Sterr, Chr Tamm, R Le Targat, P Tuckey, G Vallet, T Waterholter, D Xu, P Wolf
Publikováno v:
New Journal of Physics, Vol 22, Iss 9, p 093010 (2020)
We search for transient variations of the fine structure constant using data from a European network of fiber-linked optical atomic clocks. By searching for coherent variations in the recorded clock frequency comparisons across the network, we signif
Externí odkaz:
https://doaj.org/article/e2e070ab3cec4b40854dc0882b271fe7
Autor:
G. P. Barwood, B. R. Walton, G Huang, S. N. Lea, P. Gill, H. A. Klein, H. S. Margolis, Krzysztof Szymaniec, K. Hosaka
Publikováno v:
International Conference on Space Optics — ICSO 2006.
Increasingly stringent demands on atomic timekeeping, driven by applications such as global navigation satellite systems (GNSS), communications, and very-long baseline interferometry (VBLI) radio astronomy, have motivated the development of improved
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0164e532ae98e99d9eba0bf29955875
https://doi.org/10.1117/12.2308177
https://doi.org/10.1117/12.2308177
Autor:
J, Leute, N, Huntemann, B, Lipphardt, Christian, Tamm, P B R, Nisbet-Jones, S A, King, R M, Godun, J M, Jones, H S, Margolis, P B, Whibberley, A, Wallin, M, Merimaa, P, Gill, E, Peik
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 63(7)
We used precise point positioning, a well-established GPS carrier-phase frequency transfer method to perform a direct remote comparison of two optical frequency standards based on single laser-cooled [Formula: see text] ions operated at the National
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::8cc5f40168adbeddd349bec2781c7ead
https://pubmed.ncbi.nlm.nih.gov/26863657
https://pubmed.ncbi.nlm.nih.gov/26863657
Autor:
R M, Godun, P B R, Nisbet-Jones, J M, Jones, S A, King, L A M, Johnson, H S, Margolis, K, Szymaniec, S N, Lea, K, Bongs, P, Gill
Publikováno v:
Physical review letters. 113(21)
Singly ionized ytterbium, with ultranarrow optical clock transitions at 467 and 436 nm, is a convenient system for the realization of optical atomic clocks and tests of present-day variation of fundamental constants. We present the first direct measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::40640a0a8ce758d8a3295b0d540849b5
https://pubmed.ncbi.nlm.nih.gov/25479482
https://pubmed.ncbi.nlm.nih.gov/25479482
Publikováno v:
Infectious Disease Clinics of North America. 12:13-26
Hepatitis C virus (HCV) has emerged as a major cause of chronic liver disease worldwide. The widespread endemicity of HCV infection is the result of a combination of factors, including those related to the genetic diversity of the virus and the host
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7868f753893678d2b9ff19218e60724
https://doi.org/10.1016/s0891-5520(05)70405-0
https://doi.org/10.1016/s0891-5520(05)70405-0
Publikováno v:
Science. 272:631c-635
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebe0daf0154001278d7e186aceab7053
https://doi.org/10.1126/science.272.5262.631c
https://doi.org/10.1126/science.272.5262.631c
Autor:
H. S. Margolis
Publikováno v:
JAMA: The Journal of the American Medical Association. 274:1201-1208
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8c8a91ff2348dce1249a60e783500c5
https://doi.org/10.1001/jama.274.15.1201
https://doi.org/10.1001/jama.274.15.1201
Publikováno v:
Review of Scientific Instruments. 67:983-985
A super‐EBIT may be defined by its ability to ionize even hydrogenlike uranium, requiring an electron energy well above 140 keV. The first super‐EBIT has been put into operation at Livermore, operating with electron energies up to 200 keV, the se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e5a353a67b36a53c5115081ce2aad29
https://doi.org/10.1063/1.1146789
https://doi.org/10.1063/1.1146789
Publikováno v:
Physical review letters. 93(13)
The quadrupole moment of the 4d (2)D(5/2) level in 88Sr+ has been measured to be 2.6(3)ea(2)(0), where a(0) is the Bohr radius and e the elementary charge. A single laser-cooled strontium ion was confined in an end cap trap with a variable dc quadrup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::2ae79fdf15e1ec3eb003a3a81a8688a1
https://pubmed.ncbi.nlm.nih.gov/15524716
https://pubmed.ncbi.nlm.nih.gov/15524716