@article{BreitenbachIlluminatiSchilleretal.1998,
  author    = {Breitenbach, Gerd and Illuminati, Fabrizio and Schiller, Stephan and Mlynek, J{\"u}rgen},
  title     = {Broadband detection of squeezed vacuum : a spectrum of quantum states},
  year      = {1998},
  abstract  = {We demonstrate the simultaneous quantum state reconstruction of the spectral modes of the light field emitted by a continuous wave degenerate optical parametric amplifier. The scheme is based on broadband measurement of the quantum fluctuations of the electric field quadratures and subsequent Fourier decomposition into spectral intervals. Applying the standard reconstruction algorithms to each bandwidth-limited quantum trajectory, a "spectrum" of density matrices and Wigner functions is obtained. The recorded states show a smooth transition from the squeezed vacuum to a vacuum state. In the time domain we evaluated the first order correlation function of the squeezed output field, showing good agreement with theory.},
  language  = {en}
}
@article{FelbingerSchillerMlynek1998,
  author    = {Felbinger, Timo and Schiller, Stephan and Mlynek, J{\"u}rgen},
  title     = {Oscillation and generation of nonclassical states in three-photon down conversion},
  year      = {1998},
  abstract  = {The process of 3-photon down conversion 3 omega -> omega + omega + omega in an optical cavity is analyzed theoretically. A classical feature of this system is a first-order transition of the fundamental mode above a threshold 3omega pump power. We calculate the quantum properties of the steady state both using quantum trajectory simulations, and by perturbation expansion of the density operator. A nongaussian Wigner function exhibiting a threefold symmetry is found. Above threshold the Wigner function displays separate peaks among which tunneling occurs.},
  language  = {en}
}