Broadband detection of squeezed vacuum : a spectrum of quantum states
- 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.
Author details: | Gerd Breitenbach, Fabrizio Illuminati, Stephan Schiller, Jürgen Mlynek |
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Publication type: | Article |
Language: | English |
Year of first publication: | 1998 |
Publication year: | 1998 |
Release date: | 2017/03/24 |
Source: | Europhysics Letters. - 44 (1998), 2, S. 192 - 198 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |