Publications by the Nanofiber group

In this publication we explain how to use spin squeezing in an atomic clock

Entanglement-assisted atomic clock beyond the projection noise limit

Louchet-Chauvet, A., Appel, J., Renema, J.J., Oblak, D., Kjærgaard, N. & Polzik, E.S.
New Journal Of Physics, 2010, Vol. 12(6), pp. 065032-+
doi:10.1088/1367-2630/12/6/065032, arXiv:0912.3895

    In this publication we tell how to produce spin squeezing by a quantum-nondemolition measurement

    Mesoscopic atomic entanglement for precision measurements beyond the standard quantum limit
    Appel, J., Windpassinger, P.J., Oblak, D., Busk Hoff, U., Kjærgaard, N. & Polzik, E.S.
    Proceedings Of The National Academy Of Sciences, 2009, Vol. 106, pp. 10960-10965
    doi:10.1073/pnas.0901550106, arXiv:0810.3545

      A long review paper on spin squeezing

      Jian Ma, Xiaoguang Wang, C. P. Sun, Franco Nori,
      Quantum spin squeezing,  arXiv:1011.2978v2

        We use Ramsey spectroscopy and Spin-Echo to investigate the atomic motion in our trap

        Echo spectroscopy of atomic dynamics in a Gaussian trap via phase imprints
        Oblak, D., Appel, J., Windpassinger, P.J., Busk Hoff, U., Kjærgaard, N. & Polzik, E.S.
        European Physical Journal D, 2008, Vol. 50, pp. 67-73
        doi:10.1140/epjd/e2008-00192-1, arXiv:0807.0254

          In this paper we use non-destructive phase-shift measurements to probe the atomic state

          Nondestructive Probing of Rabi Oscillations on the Cesium Clock Transition near the Standard Quantum Limit
          Windpassinger, P.J., Oblak, D., Petrov, P.G., Kubasik, M., Saffman, M., Alzar, C.L.G., Appel, J., Müller, J.H., Kjærgaard, N. & Polzik, E.S.
          Physical Review Letters, 2008, Vol. 100(10), pp. 103601-+
          doi:10.1103/PhysRevLett.100.103601, arXiv:0801.4126


          • Daniel Oblak,
            Quantum State Engineering in Cold Caesium Atoms,
            PhD-thesis, University of Copenhagen (2009).

          • Patrick Joachim Windpassinger ,
            Non-destructive Quantum State Measurements and Quantum Noise Squeezing,
            PhD-thesis, University of Copenhagen (2008).

          • Nicolai Backer og Jes Ravnsbøl ,
            Investigation of Rabi Oscillations on the Caesium Clock-Transition and Measurements Using Ramsey-Type Experiments,
            Bachelor-thesis, University of Copenhagen (2007).

          • Plamen Georgiev Petrov,
            Quantum noise limited light interferometry with cold trapped atoms,
            PhD-thesis, University of Copenhagen (2006).

          • Jan Hald,
            Spin Squeezing in a Cold Atomic Ensemble,
            PhD-thesis, University of Copenhagen (2000).