"Mysteriöse Quantenraumzeit: Warum 3+1 manchmal 2 ergibt"
- Date:
- Th, 29.03.2012 18:00 – Th, 29.03.2012 19:00
- Speaker:
- Renate Loll, Universität Utrecht, Niederlande
- Address:
- Technische Universität Berlin
Straße des 17. Juni 135, 10623 Berlin, Germany
H 0105
- Language:
- Deutsch
- Event partner:
- Österreichische Physikalische Gesellschaft
- DPG Association:
- Working Group on Equal Opportunities (AKC)
Description
Mit dieser jährlichen Veranstaltungsreihe sollen herausragende Wissenschaftlerinnen einem breiten Publikum vorgestellt werden. Neben öffentlichen und allgemein verständlichen Vorträgen sind Treffen mit Schülerinnen und Schülern sowie Diskussionen mit jungen Frauen, Studierenden und Nachwuchsforschern vorgesehen.
Professor Renate Loll von der Universität Utrecht, Niederlande, wird über: "More than meets the eye: probing the planckian structure of spacetime” sprechen.
Der Vortrag findet im Rahmen der Jahrestagung der DPG in Berlin am Donnerstag, den 29.3.2012, von 18 - 19:00 Uhr an der TU Berlin in H 0105 statt. Die Vortragssprache ist Deutsch.
Abstract
More than meets the eye: Probing the Planckian structure of spacetime
Renate Loll — Institute for Theoretical Physics, Utrecht University, The Netherlands
Time and Space are at once ubiquitous and mysterious. We are immersed in space and experience the flow of time, but what is their essence and origin? Our view of space and time has undergone radical changes since Newton’s days. In Relativity, they form inseparable parts of a four-dimensional “spacetime”, which moreover can bend and move, encoding the gravitational interactions of matter and energy. Beyond the validity of Einstein’s classical theory, we expect further insights into the nature of spacetime from quantum gravity, the eagerly searched-for unification of relativity and quantum theory: what governs the quantum dynamics of spacetime on ultrashort, Planckian scales? How can it explain the observed macroscopic structure of spacetime? Are space, time, causality and dimensionality still meaningful notions at the Planck scale, or merely emergent properties of a dynamical ensemble of more fundamental microscopic ‘building blocks’?
I will report on recent, unprecedented progress in a new formulation of quantum gravity, a concrete (and computable!) realization in terms of “Causal Dynamical Triangulations” of a Feynman path integral. Intriguingly, it has been possible to extract physical properties of this quantum superposition of spacetimes with the help of numerical “experiments”. They confirm the nonclassical and counter-intuitive nature of spacetime at the Planck scale - including a bizarre behaviour of “dimensions” - and the emergence of classicality on large scales.