Kjetil Børkje

Associate professor

Faculty of Technology, Natural Sciences and Maritime Sciences
Department of Science and Industry systems
Campus Kongsberg ()
I am interested in the control and manipulation of artificial systems in the quantum regime, in particular exploration of quantum motion of large-scale objects as well as engineering of single-photon nonlinearities in solid state systems. My interests include quantum optics, cavity optomechanics, cavity/circuit QED, trapped ions, etc. I am also interested in certain aspects of many-particle physics.



  • 2017-               Associate professor, University College of Southeast Norway
  • 2015-2016       Associate professor, Royal Norwegian Naval Academy
  • 2014-2015       Postdoc, University of Oslo
  • 2012-2014       Postdoc, Niels Bohr Institute
  • 2009-2012       Postdoc, Yale University


  • 2008     PhD, physics, Norwegian University of Science and Technology
  • 2003     Siv.ing. (MSc), physics and mathematics, Norwegian University of Science and Technology


Selected publications

  • Single-photon optomechanics,
    A. Nunnenkamp, K. Børkje, S. M. Girvin, Phys. Rev. Lett. 107, 063602 (2011)
  • Signatures of nonlinear cavity optomechanics in the weak coupling regime,
    K. Børkje, A. Nunnenkamp, J. D. Teufel, S. M. Girvin, Phys. Rev. Lett. 111, 053603 (2013)
  • Ground state cooling of mechanical motion in the unresolved sideband regime by use of optomechanically induced transparency,
    T. Ojanen, K. Børkje, Phys. Rev. A 90, 013824 (2014) 
  • Heterodyne photodetection measurements on cavity optomechanical systems: Interpretation of sideband asymmetry and limits to a classical explanation,
    K. Børkje, Phys. Rev. A 94, 043816 (2016)

See more at Google Scholar