J
Jan W. Thomsen
Researcher at University of Copenhagen
Publications - 64
Citations - 2136
Jan W. Thomsen is an academic researcher from University of Copenhagen. The author has contributed to research in topics: Atomic clock & Laser. The author has an hindex of 18, co-authored 60 publications receiving 1906 citations. Previous affiliations of Jan W. Thomsen include National Institute of Standards and Technology & University of Colorado Boulder.
Papers
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Journal ArticleDOI
Sr lattice clock at 1 x 10(-16) fractional uncertainty by remote optical evaluation with a Ca clock.
Andrew D. Ludlow,Tanya Zelevinsky,Gretchen K. Campbell,Sebastian Blatt,Martin M. Boyd,M. H. G. de Miranda,Michael J. Martin,Jan W. Thomsen,Seth M. Foreman,Jun Ye,Tara M. Fortier,Jason Stalnaker,Scott A. Diddams,Y. Le Coq,Z. W. Barber,Nicola Poli,Nathan D. Lemke,Kristin M. Beck,Christopher W. Oates +18 more
TL;DR: A high-performance remote comparison of optical clocks over kilometer-scale urban distances is realized and the uncertainty of a strontium (Sr) optical lattice clock at the 1 × 10–16 fractional level is evaluated, surpassing the current best evaluations of cesium (Cs) primary standards.
Journal ArticleDOI
New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks.
Sebastian Blatt,Andrew D. Ludlow,Gretchen K. Campbell,Jan W. Thomsen,Tanya Zelevinsky,Martin M. Boyd,Jun Ye,X. Baillard,Mathilde Fouché,R. Le Targat,A. Brusch,Pierre Lemonde,Masao Takamoto,Feng-Lei Hong,Hidetoshi Katori,Victor V. Flambaum +15 more
TL;DR: The 1S0-3P0 clock transition frequency in neutral 87Sr has been measured relative to the Cs standard by three independent laboratories in Boulder, Paris, and Tokyo over the last three years.
Journal ArticleDOI
Rabi spectroscopy and excitation inhomogeneity in a one-dimensional optical lattice clock
Sebastian Blatt,Jan W. Thomsen,Gretchen K. Campbell,Andrew D. Ludlow,Matthew Swallows,Michael J. Martin,Martin M. Boyd,Jun Ye +7 more
TL;DR: In this article, the influence of atomic motion on precision Rabi spectroscopy of ultracold fermionic atoms confined in a deep one-dimensional optical lattice was investigated.
Journal ArticleDOI
The absolute frequency of the 87 Sr optical clock transition
Gretchen K. Campbell,Andrew D. Ludlow,Sebastian Blatt,Jan W. Thomsen,Michael J. Martin,Marcio H. G. de Miranda,Tanya Zelevinsky,Martin M. Boyd,Jun Ye,Scott A. Diddams,Thomas P. Heavner,Thomas E. Parker,Steven R. Jefferts +12 more
TL;DR: In this article, the absolute frequency of the 1 S 0 − 3 P 0 clock transition of 87 Sr has been measured to be 429 228 004 229 873 using lattice-confined atoms, where the fractional uncertainty of 8.6 × 10 −16 represents one of the most accurate measurements of an atomic transition frequency.
Journal ArticleDOI
The absolute frequency of the 87Sr optical clock transition
Gretchen K. Campbell,Andrew D. Ludlow,Sebastian Blatt,Jan W. Thomsen,Michael J. Martin,Marcio H. G. de Miranda,Tanya Zelevinsky,Martin M. Boyd,Jun Ye,Scott A. Diddams,Thomas P. Heavner,Thomas E. Parker,Steven R. Jefferts +12 more
TL;DR: The absolute frequency of the 1S0-3P0 clock transition of 87Sr has been measured to be 429 228 004 229 873 as mentioned in this paper, where the fractional uncertainty of 8.6x10-16 represents one of the most accurate measurements of an atomic transition frequency to date.