Kommende 5 dager
Tenk tilbake på da du var liten og tegnet med kritt på fortauet. Hadde du noen anelse om at den støvete steinen du holdt i hånden kunne være med på å løse verdens stadig økende klimaproblemer?
Stine Christoffersen, Fysisk institutt og OUS/Radiumhospitalet
Bjørn Solheim, FI
What do space and time look like on the very smallest scales ? Do space and time really exist, or are they just emergent concepts that serve as useful approximations in some physical domains? Following Einstein's insights we are lead to believe that the answers to questions about microscopic geometry lie in finding a microscopic theory of gravity. Loop quantum gravity (LQG) is a theory that encapsulates the core principles of quantum theory and general relativity (GR) with minimal extra assumptions. LQG can be seen both as a specific quantization of GR, and as a set of general methods for non-perturbative quantization of diffeomorphism invariant theories in a background independent manner. LQG leads to a well-defined theory of (spatial) quantum geometry, where geometric variables like area and volume take discrete values. LQG has been "successfully" applied to cosmology and black holes where it eliminates the singularities and gives a fully quantum version of these gravitational systems. The presentation will focus on the foundations of LQG with some applications in cosmology.
(The slides will be available after the talk)
Flere kommende arrangementer
Ingrid Digernes, Intervensjonsavdelingen/Oslo Universitetssykehus og Fysisk instutt
Einar Waldeland, Radiumhospitalet, Oslo Universitetssykehus
Tord Ekelöf, Professor of Elementary Particle Physics, Uppsala University
Trial lecture: Pattern formation in granular materials (10:15)
Dissertation: Statistical properties of sheared suspensions (13:15)