Hannover 2016 – wissenschaftliches Programm

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SYPS: PhD Symposium Synthesized Gauge Fields and Experimental Realizations

SYPS 1: Synthesized Gauge Fields and Experimental Realizations

SYPS 1.1: Hauptvortrag

Dienstag, 1. März 2016, 14:30–15:00, e415

Artificial magnetism and cold atomic gases — •Jean Dalibard — Collège de France and Laboratoire Kastler Brossel, 11 Place Marcelin Berthelot, 75005 Paris, France

The simulation of condensed matter systems is certainly one of the most appealing perspectives opened in the physics of cold atomic gases. Among the large variety of quantum collective phenomena that one hopes to address with atomic vapours, magnetism is one of the richest. However the quest for the simulation of magnetism immediately raises a challenging question: can a system of neutral atoms behave as an assembly of charged particles in a magnetic field?

In this introductory lecture I will explain how atom-light interaction allows one to answer this question positively. I will present some strategies for engineering artificial gauge fields, based for example on the notion of Berry's phase or on time-modulated Hamiltonians. I will also discuss how the notion of topology can emerge in the context of cold quantum matter and explain how it can be characterized by an integer, the so-called Chern number.