TY  - JOUR
A1  - Breitenbach, Gerd
A1  - Illuminati, Fabrizio
A1  - Schiller, Stephan
A1  - Mlynek, Jürgen
T1  - Broadband detection of squeezed vacuum : a spectrum of quantum states
N2  - 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.
Y1  - 1998
ER  -