| Frequency ratio of two optical clock transitions in 171Yb+ 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 | 504 | 2014 |
| Modulation transfer spectroscopy in atomic rubidium DJ McCarron, SA King, SL Cornish Measurement Science and Technology 19 (10), 105601, 2008 | 286 | 2008 |
| Coherent laser spectroscopy of highly charged ions using quantum logic P Micke, T Leopold, SA King, E Benkler, LJ Spieß, L Schmoeger, ... Nature 578 (7793), 60-65, 2020 | 122 | 2020 |
| Agreement between two 88Sr+ optical clocks to 4 parts in 10^17 GP Barwood, G Huang, HA Klein, LAM Johnson, SA King, HS Margolis, ... Physical Review A 89 (5), 050501, 2014 | 107 | 2014 |
| 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 | 78 | 2012 |
| Analysis of thermal radiation in ion traps for optical frequency standards M Doležal, P Balling, PBR Nisbet-Jones, SA King, JM Jones, HA Klein, ... Metrologia 52 (6), 842, 2015 | 71 | 2015 |
| Modified hyper-Ramsey methods for the elimination of probe shifts in optical clocks R Hobson, W Bowden, SA King, PEG Baird, IR Hill, P Gill Physical Review A 93 (1), 010501, 2016 | 53 | 2016 |
| Closed-cycle, low-vibration 4 K cryostat for ion traps and other applications P Micke, J Stark, SA King, T Leopold, T Pfeifer, L Schmöger, M Schwarz, ... Review of Scientific Instruments 90, 065104, 2019 | 50 | 2019 |
| A single-ion trap with minimized ion–environment interactions PBR Nisbet-Jones, SA King, JM Jones, RM Godun, CFA Baynham, ... Applied Physics B 122, 1-8, 2016 | 39 | 2016 |
| A cryogenic radio-frequency ion trap for quantum logic spectroscopy of highly charged ions T Leopold, SA King, P Micke, A Bautista-Salvador, JC Heip, C Ospelkaus, ... Review of Scientific Instruments 90, 073201, 2019 | 36 | 2019 |
| Absolute frequency measurement of the 2S1/2 →2F7/2 optical clock transition in 171Yb+ with an uncertainty of 4 × 10−16 using a frequency link to international atomic time CFA Baynham, RM Godun, JM Jones, SA King, PBR Nisbet-Jones, ... Journal of Modern Optics 65 (5-6), 585-591, 2018 | 34* | 2018 |
| An Optical Atomic Clock Based on a Highly Charged Ion SA King, LJ Spieß, P Micke, A Wilzewski, T Leopold, E Benkler, R Lange, ... Nature 611, 43–47, 2022 | 33 | 2022 |
| Frequency Comparison ofIon Optical Clocks at PTB and NPL via GPS PPP J Leute, N Huntemann, B Lipphardt, C Tamm, PBR Nisbet-Jones, SA King, ... IEEE transactions on ultrasonics, ferroelectrics, and frequency control 63 …, 2016 | 29 | 2016 |
| Direct comparisons of European primary and secondary frequency standards via satellite techniques F Riedel, A Al-Masoudi, E Benkler, S Dörscher, V Gerginov, C Grebing, ... Metrologia, 2020 | 27 | 2020 |
| Algorithmic Ground-State Cooling of Weakly Coupled Oscillators Using Quantum Logic SA King, LJ Spieß, P Micke, A Wilzewski, T Leopold, JRC López-Urrutia, ... Physical Review X 11, 041049, 2021 | 21 | 2021 |
| Sensitivity to new physics of isotope-shift studies using the coronal lines of highly charged calcium ions NH Rehbehn, MK Rosner, H Bekker, JC Berengut, PO Schmidt, SA King, ... Physical Review A 103 (4), L040801, 2021 | 19 | 2021 |
| Frequency measurement of the 2S1/2 - 2D3/2 electric quadrupole transition in a single 171Yb+ ion S Webster, R Godun, S King, G Huang, B Walton, V Tsatourian, ... IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 57 …, 2010 | 19 | 2010 |
| Frequency noise processes in a strontium ion optical clock GP Barwood, G Huang, SA King, HA Klein, P Gill Journal of Physics B: Atomic, Molecular and Optical Physics 48 (3), 035401, 2015 | 14 | 2015 |
| An ultralow-noise superconducting radio-frequency ion trap for frequency metrology with highly charged ions J Stark, C Warnecke, S Bogen, S Chen, EA Dijck, S Kühn, MK Rosner, ... Review of Scientific Instruments 92, 083203, 2021 | 13 | 2021 |
| A self-injection locked DBR laser for laser cooling of beryllium ions SA King, T Leopold, P Thekkeppatt, PO Schmidt Applied Physics B 124 (11), 214, 2018 | 8 | 2018 |
Helen MargolisNPL Senior Fellow, National Physical Laboratory, UKVerified email at npl.co.uk
