Specialeforsvar – Niels Bohr Institute - University of Copenhagen

Niels Bohr Institute > Calendar > 2009 > Specialeforsvar


Specialeforsvar af Lars S. Madsen 

This talk will consists of both experimental and theoretical work done on quantum light-atom interactions in cesium vapor cells.


One of the current limitations when working with these interactions is the so called "light induced decoherence", which is an unknown decoherence mechanism proportional to both the number of photons and the number of atoms.


We will treat an advanced version of the well known Quantum Non Demolition (QND)/ dipole (a1) interaction by including the quadrupole (a2) terms. We compare with other theoretical work and show experimental results which verify the theory and show that half of the "light induced decoherence" can be explained as a coherent part of the interaction.