Publications

  • Costas Christoforou, Corentin Pignot, Ezra Kassa, Hiroki Takahashi, Matthias Keller
    Enhanced ion–cavity coupling through cavity cooling in the strong coupling regime.
    Scientific Reports 10, 15693 (2020)
    The datasets for the figures are available here.

  • Anas R. Peerzada, Callan M. Jobson, Ezra Kassa, Jack Morphew, Xavier Fernandez-Gonzalvo, Matthias Keller
    Versatile Optical Fiber Feedthroughs for Ultra-High Vacuum Applications.
    Vacuum 180,  109542 (2020)


  • Thomas  Walker,  Samir Vartabi Kashanian, Travers Ward, Matthias  Keller
    Improving the Indistinguishability of Single Photons from an Ion-Cavity System.
    Physical Review A 102, 032616 (2020)
    The datasets for the figures are available here.

  • Ryan Wagner, Felipe Guzman, Akobuije Chijioke, Gurpreet Kaur Gulati, Matthias Keller and Gordon Shaw
    Direct measurement of radiation pressure and circulating power inside a passive optical cavity.
    Optics Express 26, 23492-23506 (2018).


  • Thomas Walker, Koichiro Miyanishi, Rikizo Ikuta, Hiroki Takahashi, Samir Vartabi Kashanian, Yoshiaki Tsujimoto, Kazuhiro Hayasaka, Takashi Yamamoto, Nobuyuki Imoto and Matthias Keller
    Long-distance single photon transmission from a trapped ion via quantum frequency conversion.
    Physical review letters 120 (20), 203601 (2018)



  • Hiroki Takahashi, Ezra Kassa, Costas Christoforou, and Matthias Keller
    Cavity-induced anticorrelated photon-emission rates of a single ion.
    Phys. Rev. A 96, 023824  (2017)

  • Gurpreet Kaur Gulati, Hiroki Takahashi, Nina Podoliak, Peter Horak and Matthias Keller
    Fiber cavities with integrated mode matching optics.
    Scientific Reports 7, 5556 (2017)




  • A. Márquez Seco, H. Takahashi and M. Keller
    Novel Ion Trap Design for Strong Ion-Cavity Coupling.
    Atoms  4, 15 (2016)


  • N. Deb, L.L. Pollum, A.D. Smith, M. Keller, C.J. Rennick, B.R. Heazlewood, and T.P. Softley
    Coulomb crystal mass spectrometry in a digital ion trap.
    Phys. Rev. A 91, 033408 (2015)


  • A. Gardner, K. Sheridan, W. Groom, N. Seymour-Smith and M. Keller
    Precision spectroscopy technique for dipole-allowed transitions in laser-cooled ions.
    Appl. Phys. B 117, 755-762 (2014)

  • Hiroki Takahashi, Jack Morphew, Fedja Oručević, Atsushi Noguchi, Ezra Kassa, and Matthias Keller
    Novel laser machining of optical fibers for long cavities with low birefringence.
    Optics Express  22, 31317-31328 (2014)


  • H. Takahashi, A. Wilson, A. Riley-Watson, F. Orucevic, N. Seymour-Smith, M. Keller and W. Lange,
    An integrated fiber trap for single-ion photonics.
    New J. Phys. 15, 053011 (2013)