| Frequency Ratio of Two Optical Clock Transitions in and Constraints on the Time Variation of Fundamental Constants RM Godun, PBR Nisbet-Jones, JM Jones, SA King, LAM Johnson, ... Physical review letters 113 (21), 210801, 2014 | 542 | 2014 |
| Geodesy and metrology with a transportable optical clock J Grotti, S Koller, S Vogt, S Häfner, U Sterr, C Lisdat, H Denker, C Voigt, ... Nature Physics 14 (5), 437-441, 2018 | 478 | 2018 |
| Hertz-level measurement of the optical clock frequency in a single 88Sr+ ion HS Margolis, GP Barwood, G Huang, HA Klein, SN Lea, K Szymaniec, ... Science 306 (5700), 1355-1358, 2004 | 459 | 2004 |
| The CODATA 2017 values of h, e, k, and NA for the revision of the SI DB Newell, F Cabiati, J Fischer, K Fujii, SG Karshenboim, HS Margolis, ... Metrologia 55 (1), L13, 2018 | 335 | 2018 |
| Test of special relativity using a fiber network of optical clocks P Delva, J Lodewyck, S Bilicki, E Bookjans, G Vallet, R Le Targat, ... Physical review letters 118 (22), 221102, 2017 | 219 | 2017 |
| Einstein Gravity Explorer–a medium-class fundamental physics mission S Schiller, GM Tino, P Gill, C Salomon, U Sterr, E Peik, A Nevsky, A Görlitz, ... Experimental astronomy 23, 573-610, 2009 | 136 | 2009 |
| High-resolution microwave frequency transfer over an 86-km-long optical fiber network using a mode-locked laser G Marra, R Slavík, HS Margolis, SN Lea, P Petropoulos, DJ Richardson, ... Optics letters 36 (4), 511-513, 2011 | 129 | 2011 |
| Measurement of the Electric Quadrupole Moment of the Level in GP Barwood, HS Margolis, G Huang, P Gill, HA Klein Physical review letters 93 (13), 133001, 2004 | 112 | 2004 |
| Agreement between two optical clocks to 4 parts in 10 GP Barwood, G Huang, HA Klein, LAM Johnson, SA King, HS Margolis, ... Physical Review A 89 (5), 050501, 2014 | 110 | 2014 |
| Absolute frequency measurement of the 674-nm clock transition using a femtosecond optical frequency comb HS Margolis, G Huang, GP Barwood, SN Lea, HA Klein, WRC Rowley, ... Physical Review A 67 (3), 032501, 2003 | 108 | 2003 |
| Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks BM Roberts, P Delva, A Al-Masoudi, A Amy-Klein, C Baerentsen, ... New Journal of Physics 22 (9), 093010, 2020 | 102 | 2020 |
| Geodetic methods to determine the relativistic redshift at the level of 10 in the context of international timescales: a review and practical results H Denker, L Timmen, C Voigt, S Weyers, E Peik, HS Margolis, P Delva, ... Journal of Geodesy 92, 487-516, 2018 | 92 | 2018 |
| The Oxford electron‐beam ion trap: A device for spectroscopy of highly charged ions JD Silver, AJ Varney, HS Margolis, PEG Baird, IP Grant, PD Groves, ... Review of scientific instruments 65 (4), 1072-1074, 1994 | 89 | 1994 |
| Dissemination of an optical frequency comb over fiber with 3 × 10−18 fractional accuracy G Marra, HS Margolis, DJ Richardson Optics express 20 (2), 1775-1782, 2012 | 86 | 2012 |
| Absolute frequency measurement of the 2S1/2–2F7/2 electric octupole transition in a single ion of 171Yb+ with 10− 15 fractional uncertainty SA King, RM Godun, SA Webster, HS Margolis, LAM Johnson, ... New Journal of Physics 14 (1), 013045, 2012 | 79 | 2012 |
| High-stability microwave frequency transfer by propagation of an optical frequency comb over 50 km of optical fiber G Marra, HS Margolis, SN Lea, P Gill Optics letters 35 (7), 1025-1027, 2010 | 76 | 2010 |
| Frequency measurement of the electric octupole transition in a single ion K Hosaka, SA Webster, A Stannard, BR Walton, HS Margolis, P Gill Physical Review A 79 (3), 033403, 2009 | 72 | 2009 |
| Trapped ion optical frequency standards P Gill, GP Barwood, HA Klein, G Huang, SA Webster, PJ Blythe, K Hosaka, ... Measurement Science and Technology 14 (8), 1174, 2003 | 69 | 2003 |
| Frequency metrology and clocks HS Margolis Journal of Physics B: Atomic, Molecular and Optical Physics 42 (15), 154017, 2009 | 67 | 2009 |
| High-accuracy frequency atlas of 13C2H2 in the 1.5 μm region CS Edwards, HS Margolis, GP Barwood, SN Lea, P Gill, WRC Rowley Applied Physics B 80, 977-983, 2005 | 67 | 2005 |
Hugh KleinPrincipal Research Scientist, National Physical Laboratory UKVerified email at npl.co.uk
