| Page 18 | OIST Groups

Past Events

Group Meeting: Review of Higher Spin Theories - Part 2

2019-11-25

A719, Lab 3

In this talk Mirian Tsulaia will continue with his review of Higher Spin Theories.

Abstract: This a continuation of the previous talk in this series. Today we shall discuss Vasiliev's formalism and in particular talk about free unfolded equations.

Theoretical Physics Seminar: Miquel Jorquera

2019-11-22

Lab 1, C016

Theoretical Physics Seminar.
Speaker: Miquel Jorquera.
Title: "What's so particular about photons?"

Journal club seminar: A potential probe of quantum gravity with large molecular wavepackets

2019-11-20

B 711, Lab 3

Carlos Villalpando will tell us about "A potential probe of quantum gravity with large molecular wavepackets". The talk is based on two papers: Minimal length effect on the broadening of free wave packets and its physical implications and Indirect Probe of Quantum Gravity using Molecular Wave-packets.

Abstract: The biggest obstacle for a direct test of quantum gravity is its energy scale, which is well outside of the capabilites of any human-made machine; the next best possible approach then is to provide indirect tests on effective theories of quantum gravity, which can be performed in a lower energy scale. This talk will be aimed in this direction, showing a promising path to test the existence of a fundamental, minimal length scale of Nature, by measuring the dispersion of large molecular wave-packets. The existence of this minimal length would imply a modified commutation relation between position and momentum operators, and as we will see, such a modification of the commutator has a profound effect on the dispersion rate of free wave-packets, providing a path for a potential, indirect test of quantum gravity in a laboratory setting.

Group Meeting Talk: Review of Higher Spin Theories

2019-11-18

A719, Lab 3

In this talk Mirian Tsulaia will give us an introduction to Higher Spin Theories.

Abstract: This talk will be a short and 'slow' introduction to Higher Spin Theories. Today we will discuss aspects of metric like formulation of higher spin theories.

Journal club seminar: Lorentzian Structures on Branching Spacetimes

2019-11-13

B 712, Lab 3

David O'Connell will tell us about his Master Thesis Lorentzian Structures on Branching Spacetimes.

Abstract: “Branching Spacetimes” are a class of order-theoretic models that have interested philosophers and logicians for several decades. As it stands, the name is slightly misleading – the intended models of the theory do indeed branch, but they only partially represent spacetimes in the physicists’ use of the word. In this talk we will bridge this terminological gap by introducing a class of models that naturally enrich Branching “Spacetimes” with topological, differentiable and Lorentzian structures. As we will see, these models are interesting not only from a logical point of view, but also from geometric and physical perspectives as well.