Talks

coffee, tea, cookies at 16:00 in the main hall
Monday 16:30-17:30
Seminar room 1+2
- monthly seminars -
Seminar room 4
- weekly seminars -
Monday 11:00-12:00
Room 1D1
Wednesday 16:30 - 17:30
Seminar room 1D1
Thursday 14:00-15:00
Seminar room 4

 

 

 

Vorträge in chronologischer Reihenfolge

28 Sep 2020
16:30

Colloquium: Landscape and generalisation in deep learning

Prof. Matthieu Wyart (Institute of Physics, Ecole Polytechnique Federale de Lausanne)

Deep learning is very powerful at a variety of tasks, including self-driving cars and playing go beyond human level. Despite these engineering successes, why deep learning works remains unclear; a question with many facets. I will discuss two of them: (i) Deep learning is a fitting procedure, achieved by defining a loss function which is high when data are poorly fitted. Learning corresponds to a descent in the loss landscape. Why isn’t it stuck in bad local minima, as occurs when cooling glassy systems in physics? What is the geometry of the loss landscape? (ii) in recent years it has been realised that deep learning works best in the over-parametrised regime, where the number of fitting parameters is much larger than the number of data to be fitted, contrarily to intuition and to usual views in statistics. I will propose a resolution of these two problems, based on both an analogy with the energy landscape of repulsive particles and an analysis of asymptotically wide nets.

VIRTUAL iCal Event
01 Okt 2020
14:00

tba

Pedro Ribeiro (CeFEMA, Instituto Superior Técnico, Universidade de Lisboa)

VIRTUAL iCal Event
08 Okt 2020
14:00

Oxygen vacancy-driven orbital multichannel Kondo effect in Dirac nodal line metals IrO2 and RuO2

Stefan Kirchner (Zhejiang University)

15 Okt 2020
14:00

tba

Roser Valentí (Goethe Universität Frankfurt am Main)

VIRTUAL iCal Event
19 Okt 2020
16:30

Colloquium: tba

Prof. Dr. Carlo Beenakker (Universiteit Leiden, Niederlande)

VIRTUAL iCal Event
22 Okt 2020
14:00

tba

Georg Bruun (Aarhus University)

VIRTUAL iCal Event
29 Okt 2020
14:00

tba

Hitesh Changlani (Florida State University Talahassee)

VIRTUAL iCal Event
02 Nov 2020
16:30

Colloquium: tba

Seminarroom 1+2 iCal Event
05 Nov 2020
14:00

The fine structure constant of quantum spin ice.

Salvatore D. Pace (Boston University)

VIRTUAL iCal Event
09 Nov 2020
16:30

Colloquium: tba

Prof. Dr. Christof Wetterich (Universität Heidelberg)

Seminarroom 1+2 iCal Event
12 Nov 2020
14:00

An index theorem for topological modes in passive and active fluids

Jácome Armas (University of Amsterdam)

VIRTUAL iCal Event
19 Nov 2020
14:00

Exceptional Topology of Non-Hermitian Systems: From Fundamental Theory to Applications in Quantum Sensing

Jan Carl Budich (TU Dresden)

20 Nov 2020
11:00

Title t. b. a.

Nir Gov (Weizmann Institute of Science)

Room 1D1 iCal Event
23 Nov 2020
16:30

Colloquium: tba

Prof. Dr. Anton Zeilinger (Österreichische Akademie der Wissenschaften, Wien)

VIRTUAL iCal Event
10 Dez 2020
14:00

tba

Vadim Smelyanskiy (Google)

VIRTUAL iCal Event
17 Dez 2020
14:00

tba

Fabian Essler (University of Oxford)

VIRTUAL iCal Event