Prof. Dr. M. Weidemüller
Physikalisches Institut
Im Neuenheimer Feld 226
69120 Heidelberg
Claudia Krämer
25.10.2017 17:00 / 17:30
Prof. Eugene S. Polzik, Niels Bohr Institute, University of Copenhagen, Kirchhoff-Institut, INF 227 SR 1.403

CQD special colloquium


7. July 2017 14:00

Konferenzraum 2-3, 00.102/103, Physikalisches Institut, INF 226

Measuring (spectral) quantum properties of bright beams of light

Professor Paulo Nussenzveig
University of Sao Paulo, Brazil

Optical parametric oscillators (OPOs) are among the most widely used sources of nonclassical light. When pumped at sufficiently high powers, parametric gain in these systems overcomes losses and there is oscillation. The bright beams of light that are emitted display nonclassical correlations which are typically characterized by spectral homodyne measurements. We have thoroughly investigated these systems over the past years and shown that spectral homodyne detection cannot provide the full information needed to reconstruct the quantum state. Resonator detection, on the other hand, does not suffer from the same shortcomings. In this talk, we will examine the conditions to obtain complete information about the spectral quantum state and also describe trends for use of these nonclassical light sources on silicon chips.