לוח שנה משולב

The Renyi entropy is a generalization of entanglement entropy which can be used to further characterize the ground state of a quantum field theory. I'll present an observable, analogous to the Renyi entropy, which is defined for a 3d gauge theory preserving four supercharges, and which preserves a subset of the supersymmetry. Using localization techniques, this supersymmetric Renyi entropy can be calculated exactly for a variety of strongly coupled 3d gauge theories. I’ll present the results of this calculation and some examples from interesting 3d models.

To interpret the acceleration of the universe Astronomers have invoked
the negative gravity of a highly strained space.
To gain understanding of the gravity due to the parts of the stress
tensor other than density we do thought experiments that parallel
the 18th and 19th Century experiments on Electricity carried out
by our forebears. There are 3 (or 10) conserved currents in gravity corresponding to conservation of energy, momentom, and angular momentum.
We investigate the forces generated by them.

Despite a number of core similarities on the levels of history, politics, culture and language, the Middle East and North Africa (MENA) region is extraordinarily complex, and individual Middle Eastern countries differ in virtually every way. From demographic makeup, to geography, to economy, to geostrategic considerations, the great differences among Middle Eastern nations help explain why each country has taken part differently in the Arab Awakening, as well as the markedly dissimilar government responses to the protest movements.

And yet the Arab Awakening is a phenomenon of the Middle Eastern region.
Likewise, one can enumerate challenges shared by virtually all the MENA nations, as well as the main social and political groups. This talk will analyze how the Middle East and North Africa region has been changing in the past three years. The focus of the talk will be understanding both the regional precipitants of the protests and the political, economic, and social challenges ahead.

How has the Middle East changed and what's in store for the future? How has Israel's place in the region been affected by these ongoing changes?

We'll look at the unprecedented discovery, understanding & technology
developments in photovoltaics over the past few years and will
try to put these in an alternative sustainable energy perspective.