Faculty of Physics University of Warsaw > Events > Seminars > Leopold Infeld Colloquium (till 2017/18)

Leopold Infeld Colloquium

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Nowa A(425), Hoża 69 at 15:30

prof. Maciej Lewenstein (The Institute of Photonic Sciences, Barcelona)

Ultracold atoms in artificial gauge fields

I will present a review of recent developments of a new trend in the physics of ultracold atoms, that concerns studies of the behavior ofquantum degenerate atomic clouds in presence of quantum gauge fields. I will discuss various methods of generating such artificial gaugefields, with special emphasis on the non-Abelian ones. I will then discuss few examples of effects and phenomena expected to occur insuch non-Abelian gauge fields. These include: anomalous quantum Hall effect, emergence of Dirac fermions, novel types of topologicalisolators, etc.

A(425), Hoża 69 at 15:30

Prof. Lars Bergstrom (The Oskar Klein Centre for Cosmoparticle Physics, Physics Department, Stockholm University)

Dark Matter - where do we stand?

The hunt for the identity of the particle responsible for five times more mass in the Universe than ordinary matter is getting increasinglyintensified. New hints - or false leads? - have recently appeared in the energy distribution of electrons, positrons, and gamma-rays. Dark matter annihilating in our galactic halo of dark matter is one of several possibilities.

In this talk, we will briefly review the history of the dark matter problem, and explain why the scientific community is more and moreconvinced that dark matter exists. Methods of detection will be summarized, and recent claims of detected signals discussed.

A(425), Hoża 69 at 15:30

Prof. Dieter Vollhardt (Center for Electronic Correlations and Magnetism, University of Augsburg, Germany)

Superfluid Helium-3: From very low Temperatures to the Big Bang

Since their discovery in 1971 the superfluid phases of Helium-3 have proved to be the ideal testing ground for many fundamental concepts ofmodern physics. Phenomena such as Cooper pairing, macroscopic quantum coherence, spontaneous breaking of unusual symmetries, and the formation of exotic topological defects are not only an important enrichment of the physics of condensed matter, but also provide important links to particle physics and the structure of the early universe. These discoveries where acknowledged by the Nobel prizes of 1996 and 2003. In my colloquium talk I will give a simple introduction into the physics of superfluid Helium-3.

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