Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Institut für Physik

Sonderkolloquium gemeinsam mit MBI: Prof. Dr. Maciej Lewenstein (ICFO, Barcelona) spricht zum Thema:

Why photons? A psychoanalytic portrait of a scientist as a mature man

Abstract

I will start with the origins: Maxwell theory, present five reasons to quantize, or maybe four? I will then discuss quantum theory of optical coherence, answering the question:  How to reconcile Maxwell with photons? I will describe shortly coherent states and squeezed states. I will then turn to strong field physics, starting with a historical introduction and description of the present times, where semi-classical theory is sufficient.  I will then mention the generation of Schrödinger cat states within atto-physics, answering the question: yes, we do need photons. At the end, I will discuss three mechanisms to exhibit quantumness of EM fields: i) Conditioning/post selection + applications; ii) Nonlinear effects induced by depletion/interband transitions, or dipole correlations; iii) Use quantum fields.

Das Kolloquium wird "hybrid" durchgeführt, kann also sowohl im Hörsaal als auch über zoom verfolgt werden.

Zoom Link:
https://hu-berlin.zoom.us/j/64567336962?pwd=QjhyMW5SbFVBZWVNRWJrTFBFN2Rtdz09
Meeting-ID: 645 6733 6962
Passwort: 607723