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Ian R. Hill
Researcher at National Physical Laboratory
Publications - 43
Citations - 872
Ian R. Hill is an academic researcher from National Physical Laboratory. The author has contributed to research in topics: Optical lattice & Atomic clock. The author has an hindex of 12, co-authored 37 publications receiving 596 citations.
Papers
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Journal ArticleDOI
Test of Special Relativity Using a Fiber Network of Optical Clocks.
P. Delva,Jérôme Lodewyck,S. Bilicki,E. Bookjans,Gregoire Vallet,R. Le Targat,Paul-Eric Pottie,C. Guerlin,F. Meynadier,C. Le Poncin-Lafitte,Olivier Lopez,Anne Amy-Klein,Won-Kyu Lee,Nicolas Quintin,Christian Lisdat,A. Al-Masoudi,S. Dörscher,Christian Grebing,Gesine Grosche,A. Kuhl,S. M. F. Raupach,Uwe Sterr,Ian R. Hill,Richard Hobson,William B. Bowden,J. Kronjäger,Giuseppe Marra,Antoine Rolland,Fred N. Baynes,Helen S. Margolis,Patrick Gill +30 more
TL;DR: This work obtains a constraint on the Robertson-Mansouri-Sexl parameter |α|≲1.1×10^{-8}, quantifying a violation of time dilation, thus improving by a factor of around 2 the best known constraint obtained with Ives-Stilwell type experiments.
Journal ArticleDOI
Development of a strontium optical lattice clock for the SOC mission on the ISS.
S. Origlia,Stephan Schiller,M. S. Pramod,Lyndsie Smith,Yeshpal Singh,Wei He,S. Viswam,Dariusz Świerad,J Hughes,Kai Bongs,Uwe Sterr,Ch. Lisdat,St. Vogt,S. Bize,Jérôme Lodewyck,R. Le Targat,David Holleville,Bertrand Venon,Patrick Gill,G. Barwood,Ian R. Hill,Yuri B. Ovchinnikov,Andre Kulosa,Wolfgang Ertmer,Ernst M. Rasel,J. Stuhler,Wilhelm Kaenders +26 more
TL;DR: In this paper, the authors describe the current status of the apparatus' development, including the laser subsystems, and describe the robust preparation of cold 88Sr atoms in a second-stage magneto-optical trap (MOT).
Journal ArticleDOI
Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
Benjamin Roberts,Benjamin Roberts,P. Delva,A. Al-Masoudi,Anne Amy-Klein,C. Baerentsen,C. F. A. Baynham,Erik Benkler,S. Bilicki,Sébastien Bize,William B. Bowden,J E Calvert,V. Cambier,Etienne Cantin,E. A. Curtis,S. Dörscher,Maxime Favier,Florian Frank,Patrick Gill,R. M. Godun,Gesine Grosche,Christine C. Guo,Aurélien Hees,Ian R. Hill,Richard Hobson,Nils Huntemann,J. Kronjäger,Sebastian Koke,A. Kuhl,R. Lange,Thomas Legero,Burghard Lipphardt,Ch. Lisdat,Jérôme Lodewyck,Olivier Lopez,Helen S. Margolis,H. Alvarez-Martinez,H. Alvarez-Martinez,F. Meynadier,F. Meynadier,F. Ozimek,Ekkehard Peik,Paul-Eric Pottie,Nicolas Quintin,Christian Sanner,L De Sarlo,Marco Schioppo,Roman Schwarz,Alissa Silva,Uwe Sterr,Chr. Tamm,R. Le Targat,Philip Tuckey,Guy Vallet,T. Waterholter,Dan Xu,Peter Wolf +56 more
TL;DR: In this article, the authors search for coherent variations in the recorded clock frequency comparisons across the network, and significantly improve the constraints on transient variations of the fine structure constant, for example, constraining the variation to |δα/α| ~10^4 km.
Journal ArticleDOI
Modified hyper-Ramsey methods for the elimination of probe shifts in optical clocks.
TL;DR: In this article, a new extension of existing techniques of hyper-Ramsey spectroscopy in optical clocks, achieving complete immunity to the frequency shifts induced by the probing fields themselves.
Journal ArticleDOI
Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
Benjamin Roberts,Benjamin Roberts,P. Delva,A. Al-Masoudi,Anne Amy-Klein,C. Baerentsen,C. F. A. Baynham,Erik Benkler,S. Bilicki,Sébastien Bize,William B. Bowden,J E Calvert,V. Cambier,Etienne Cantin,E. A. Curtis,S. Dörscher,Maxime Favier,Florian Frank,Patrick Gill,R. M. Godun,Gesine Grosche,Christine C. Guo,Aurélien Hees,Ian R. Hill,Richard Hobson,Nils Huntemann,J. Kronjäger,Sebastian Koke,A. Kuhl,R. Lange,Thomas Legero,Burghard Lipphardt,Ch. Lisdat,Jérôme Lodewyck,Olivier Lopez,Helen S. Margolis,H. Alvarez-Martinez,H. Alvarez-Martinez,F. Meynadier,F. Meynadier,F. Ozimek,Ekkehard Peik,Paul-Eric Pottie,Nicolas Quintin,Christian Sanner,L De Sarlo,Marco Schioppo,Roman Schwarz,Alissa Silva,Uwe Sterr,Chr. Tamm,R. Le Targat,Philip Tuckey,Guy Vallet,T. Waterholter,Dan Xu,Peter Wolf +56 more
TL;DR: In this paper, the authors search for coherent variations in the recorded clock frequency comparisons across the network, and significantly improve the constraints on transient variations of the fine structure constant, for example, constraining the variation in alpha to ~10^4 km.