Racah colloquium

image can not be displayed

Physics Colloquium : "How Particle Theorists Can Help With Gravitational-Wave Predictions"

Mon, 23/12/2019 - 12:00 to 13:30

Location: 
Levin building, Lecture Hall No. 8

Lecturer: Zvi Bern
Abstract:
The remarkable detection of gravitational waves by the LIGO/Virgo
collaboration has opened a new window into the cosmos. In this
colloquium, we explain how particle theorists can help out with
high-precision calculations relevant for gravitational-wave emission
from compact astrophysical objects. We describe theoretical tools
such as the duality between color and kinematics, double-copy
relations and generalized unitarity. We explain how these ideas can

image can not be displayed

Physics Colloquium : "Signatures of non-equilibrium statistical physics in optically driven colloidal suspension."

Mon, 30/12/2019 - 12:00 to 13:30

Location: 
Levin building, Lecture Hall No. 8

Lecturer: Prof. Yael Roichman from Tel-Aviv University
Abstract:
Colloidal suspensions are ideal for the experimental study of statistical mechanics, since they allow characterization both on the single particle level and on the ensemble level. Using optical tweezers we are able to drive these suspensions out of equilibrium in different ways and in a controlled manner to study the characteristics of different non-equilibrium steady states (NESS). We compare and contrast these different experiments to look for universal traits of such NESS.

image can not be displayed

Physics Colloquium : "Direct measurement of superconducting stiffness and its implications"

Mon, 09/12/2019 - 12:00 to 13:30

Location: 
Levin building, Lecture Hall No. 8

Lecturer: Amit Keren, Technion
Abstract:
The London equation states that in a superconductor the current density is proportional to the vector potential. The proportionality constant is called stiffness. We present a new method

Physics Colloquium : "Minkowski, Relativity and Einstein's Changing Attitudes to Mathematics"

Location: 
Levin building, Lecture Hall No. 8
Mon, 04/11/2019 - 12:00 to 13:30

Lecturer: Leo Corry - Tel Aviv University
Abstract:
Two years after Einstein’s relativity paper of 1905, Hermann Minkowski (1864-1909)
undertook the reformulation of the new theory in mathematical terms that were to
become its standard language, and that allowed its further development. Einstein’s initial
attitude towards Minkowski’s approach was rather unsympathetic, and it reflected a more
general attitude of him towards mathematics and its role in physics. Still, it was not long
image can not be displayed

Physics Colloquium : "The Origin of Gold (and other R-process elements)"

Mon, 28/10/2019 - 12:00 to 13:30

Location: 
Levin building, Lecture Hall No. 8
Lecturer: Tsvi Piran, The Hebrew University
Abstract:
The origin of the heaviest neutron rich elements has been a long standing puzzle. The
nucleosynthesis of these elements requires a neutron rich environment to enable the so
called rapid capture (r-) process. For years it was believed that these elements are
synthesized in supernovae. However in recent years evidence accumulated in favor of the
binary neutron star mergers as the dominant r-process sites. This was dramatically