Promotionsvortrag Physik: „Generation of Kerr squeezed light and its application to interferometry“

Ankündigung des Promotionsvortrags von: Herrn Nikolay Kalinin

The quantum nature of light limits the precision with which some of its characteristics can be de-fined. A variety of nonclassical states exists which, in principle, allows us to lower some of these limits. Squeezed light states are among the simplest of these nonclassical states, and yet they are very effective.

In my talk, I will present our recent advances in the generation of squeezed states using the Kerr effect in fibers, and the application of these states to interferometry. First, I will discuss the ad-vantages and challenges of Kerr squeezing in fibers. A novel setup for the generation of polariza-tion-squeezed states using this effect will be presented. The setup is very stable, produces more than 7 dB of squeezing, and does not require any active feedback loop. Results of investigation of the range of possible parameters of this system to optimize squeezing, both experimentally and numerically, will be shown. In the second part, I will talk about the application of Kerr squeezed states to interferometry. Due to the complex structure of the squeezed quantum states obtained in this method, for a long time, there hasn’t been any demonstration of a sub-shot-noise interfer-ometer using such states. For the first time, we demonstrated that it is indeed possible to enhance the sensitivity of an interferometer beyond the shot noise limit with the use of such Kerr squeezed states. Details of the experiment and results will be discussed.

(Vortrag auf Englisch)

Dem Vortrag schließt sich eine Diskussion von 15 Minuten an. Vortrag und Diskussion sind öffentlich. Diesen Verfahrensteilen folgt ein nicht öffentliches Rigorosum von 45 Minuten.