Jan Westenkær Thomsen

Professor

Quantum Information Science & Technology
Blegdamsvej 17
2100 København Ø
- jwt@nbi.ku.dk
- http://www.nbi.ku.dk
Phone: +4551680410

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2009
Published
Isotope shifts of the (3s3p) ³P_0,1,2-(3s4s) ³S₁ Mg I transitions
He, M., Therkildsen, K. T., Jensen, B. B., Brusch, A., Thomsen, Jan Westenkær & Porsev, S. G., 2009, In: Physical Review A (Atomic, Molecular and Optical Physics). 80, 2, p. 024501 4 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Metastable Magnesium fluorescence spectroscopy using a frequency-stabilized 517 nm laser
He, M., Jensen, B. B., Therkildsen, K. T., Brusch, A. & Thomsen, Jan Westenkær, 2009, In: Optics Express. 17, 9, p. 7682-7687 5 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Measurement of the spin-forbidden decay rate (3s3d)¹D2¿(3s3p)³ P_2,1 in ²⁴Mg
Therkildsen, K. T., Jensen, B. B., Ryder, C. P., Malossi, N. & Thomsen, Jan Westenkær, 2009, In: Physical Review A (Atomic, Molecular and Optical Physics). 79, 3, p. 034501 4 p.
Research output: Contribution to journal › Journal article › Research › peer-review
2008
Published
New limits on coupling of fundamental constants to gravity using ⁸⁷Sr optical lattice clocks
Blatt, S., Ludow, A., Campbell, G. & Thomsen, Jan Westenkær, 2008, In: Physical Review Letters. 100, 14, p. 140801
Research output: Contribution to journal › Journal article › Research › peer-review
Published
The absolute frequency of the ⁸⁷Sr optical clock transition
Campbell, G. K., Ludlow, A. D., Blatt, S., Thomsen, Jan Westenkær, Martin, M. J., de Miranda, M. H. G., Zelevinsky, T., Boyd, M. M., Ye, J., Diddams, S. A., Heavner, T. P., Parker, T. E. & Jefferts, S. R., 2008, In: Metrologia. 45, 5, p. 539-548 9 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Measurement of the 3s3p ^-3P₁ lifetime in magnesium using a magneto-optical trap
Hansen, P. L., Therkildsen, K. T., Malossi, N., Jensen, B. B., van Ooijen, E. D., Brusch, A., Müller, Jörg Helge, Hald, J. & Thomsen, Jan Westenkær, 2008, In: Physical Review A (Atomic, Molecular and Optical Physics). 77, 6, p. 062502
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Ultracold strontium clock: applications to the measurement of fundamental constant variations
Ludlow, A. D., Blatt, S., Zelevinsky, T., Campbell, G. K., Martin, M. J., Thomsen, Jan Westenkær, Boyd, M. M. & Ye, J., 2008, In: European Physical Journal. Special topics. 163, 1, p. 9-18 9 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Resonant energy transfer in Bose-Einstien condensates
Nicolin, A., Jensen, Mogens Høgh, Thomsen, Jan Westenkær & Carretero-Gonxález, R., 2008, In: Physica D : Non-linear Phenomena. 237, 19, p. 2476-2481
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Characterization of a magnetic trap by polarization dependent Zeeman spectroscopy
Nielsen, C. V., Lyngsø, J. K., Thorseth, A., Galouzis, M., Therkildsen, K. T., van Ooijen, E. D. & Thomsen, Jan Westenkær, 2008, In: European Physical Journal D : Atomic, Molecular and Optical Physics. 48, 1, p. 111-119
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Amplification and ASE suppression in a polarization-maintaining ytterbium-doped all-solid photonic bandgap fibre
Olausson, C. B., Falk, C. I., Lyngso, J. K., Jensen, B. B., Therkildsen, K. T., Thomsen, Jan Westenkær, Hansen, K. P., Bjarklev, A. & Broeng, J., 2008, In: Optics Express. 16, 18, p. 13657-13662
Research output: Contribution to journal › Journal article › Research › peer-review
2007
Published
Coherent quantum engineering of free-space laser cooling
Dunn, J. W., Thomsen, Jan Westenkær & Greene, C. H., 2007, In: Physical Review A (Atomic, Molecular and Optical Physics). 76, 1, p. 011401
Research output: Contribution to journal › Journal article › Research › peer-review
2005
Published
Two-photon cooling of magnesium atoms
Malossi, N., Damkjær, S., Hansen, P. L., Jacobsen, L. B., Kindt, L., Sauge, S., Thomsen, Jan Westenkær, Cruz, F. C., Allegrini, M. & Arimondo, E., 2005, In: Physical Review A (Atomic, Molecular and Optical Physics). 72, p. 051403(R) 4 p.
Research output: Contribution to journal › Journal article › Research › peer-review
2004
Published
Investigations of a two-level atom in a magneto-optical trap
Loo, F. Y., Brusch, A., Sauge, S., Allegrini, M., Arimondo, E., Andersen, Nils Overgaard & Thomsen, Jan Westenkær, 2004, In: Journal of Optics B. 6, 1, p. 81-85
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Electron transfer from optically prepared states: He⁺ + Na (3² P)¿ He (2 ^1,3 P)+ Na⁺angular differential sacttering
Nielsen, S. E., Rod, T. H., Salgado, J., Dowek, D., Houver, J. C., Thomsen, Jan Westenkær & Andersen, Nils Overgaard, 2004, In: Journal of Physics B: Atomic, Molecular and Optical Physics. 37, 10, p. 2119-2133
Research output: Contribution to journal › Journal article › Research › peer-review
2003
Published
Noter til kvante optik
Thomsen, Jan Westenkær, 2003, Museum Tusculanum. 65 p.
Research output: Book/Report › Compendium/lecture notes › Education
2002
Published
Photoionization of ultracold and Bose-Einstein condensed Rb atoms
Campini, D., Anderlini, M., Muller, J. H., Fuso, F., Morsch, O., Thomsen, Jan Westenkær & Arimondo, E., 2002, In: Physical Review A (Atomic, Molecular and Optical Physics). 66, 6, p. 043409
Research output: Contribution to journal › Journal article › Research › peer-review
Published
P-state-to-P-state transitions in optically prepared atomic collisions: III. A complete analysis of Li⁺ + Na(3p)¿Li(2p) + Na⁺ differential scattering
Dowek, D., Reiser, I., Grego, S., Andersen, Nils Overgaard, Dubois, A., Houver, J. C., Nielsen, S. E., Richter, C., Salgado, J., Svensson, Anders & Thomsen, Jan Westenkær, 2002, In: Journal of Physics B. 35, 9, p. 2051-2068 17 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Generation of 99-mW continuous-wave 285-nm radiation for magneto-optical trapping of Mg atoms
Madsen, D. N., Yu, P., Balslev, S. & Thomsen, Jan Westenkær, 2002, In: Applied physics. B, Lasers and optics (Print). 75, 8, p. 835-839 4 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Measurement of absolute photo-ionization cross sections using magnesium magneto-optical traps
Madsen, D. N. & Thomsen, Jan Westenkær, 2002, In: Journal of Physics B: Atomic, Molecular and Optical Physics. 35, 9, p. 2173-2181 8 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Energy distribution of He⁺ and He₂⁺ ions formed in ultracold He(2³S₁)+ He(2³P₂) collisions
Pieksma, M., Cizek, M., Thomsen, Jan Westenkær, Van der Straten, P. & Niehaus, A., 2002, In: Physical Review A (Atomic, Molecular and Optical Physics). 66, 2, p. 022703
Research output: Contribution to journal › Journal article › Research › peer-review
2000
Published
Fysik med Ultrakolde Atomer
Thomsen, Jan Westenkær, 2000, In: Carlsberg Årsskrift. 1, p. 16-20
Research output: Contribution to journal › Journal article › Research
Published
Photoassociation spectroscopy of cold He(2³S) atoms
Thomsen, Jan Westenkær, 2000, In: Physical Review Letters. 84, 9, p. 1874-1877 3 p.
Research output: Contribution to journal › Journal article › Research › peer-review
1999
Published
Spatial dependence of electron transfer from optically prepared states: Li+ +Na(3p) -> Li(2p) + Na+
Andersen, N. & Thomsen, Jan Westenkær, 1999, In: Journal of Physics B: Atomic, Molecular and Optical Physics. 32, p. 5189-5204
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Spatial dependence of electron transfer from optically prepared states: Li⁺ + Na(3p) ¿: Li(2p) + Na⁺
Thomsen, Jan Westenkær, Salgado, J., Andersen, Nils Overgaard, Dowek, D., Dubois, A., Houver, J. C., Nielsen, S. E. & Svensson, Anders, 1999, In: J. Phys. B: At. Mol. Opt. Phys.. 32, p. 5189-5204
Research output: Contribution to journal › Journal article › Research › peer-review
1997
Published
State propensities in electron transfer processes from optically prepared states: H⁺ + Na(3s,3p) ¿ H(n=2,3) + Na⁺
Salgado, J., Thomsen, Jan Westenkær, Andersen, Nils Overgaard, Dowek, D., Dubois, A., Houver, J. C., Nielsen, S. E., Reiser, I. & Svensson, Anders, 1997, In: Journal of Physics B: Atomic, Molecular and Optical Physics. 30, 13, p. 3059-3075
Research output: Contribution to journal › Journal article › Research › peer-review

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Towards passive and active laser stabilization using cavity-enhanced atomic interaction
Research output: Contribution to journal › Journal article › Research › peer-review
Published
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Petabit-per-second data transmission using a chip-scale microcomb ring resonator source
Research output: Contribution to journal › Journal article › Research › peer-review
Published
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Single Dark-Pulse Kerr Comb Supporting 1.84 Pbit/s Transmission over 37-Core Fiber
Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
Published