Essays about: "Allmän relativitetsteori"

Showing result 1 - 5 of 8 essays containing the words Allmän relativitetsteori.

1. 1. Gravitational Decoherence in Macroscopic Quantum Systems

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Niklas Engelhardt Önne; [2023]
   Keywords : decoherence; gravitational decoherence; quantum mechanics; quantum physics; macroscopic quantum mechanics; macroscopic quantum physics; gravity; general relativity; gravitational time dilation; quantum-to-classical transition; nonrelativistic quantum mechanics; quantum gravity; dekoherens; gravitationell dekoherens; kvantmekanik; kvantfysik; makroskopisk kvantmekanik; makroskopisk kvantfysik; gravitation; allmän relativitetsteori; gravitationell tidsdilatation; övergången från kvantfysik till klassisk fysik; ickerelativistisk kvantmekanik; kvantgravitation;

   Abstract : The problem of how quantum mechanics gives rise to classicality has been debated for more than a century. A commonly proposed solution is decoherence, i.e. the gradual decay of superpositions in open quantum systems due to their inevitable interaction with their environment. READ MORE

3. 2. Matter-streams as sources of the Kerr metric

   University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Author : Julian Boy; [2022]
   Keywords : General Relativity; Black holes; Physics; Kerr metric; Physics and Astronomy;

   Abstract : An introduction to the thin-shell formalism and distributional approach to General Relativity is provided. The formalism is utilized to investigate possible distributions of matter that can act as a source to the Kerr metric. READ MORE

4. 3. General Relativity and Dynamical Universes

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Kajsa Fransson; [2021]
   Keywords : cosmology; general relativity; scale factor; friedmann equation;

   Abstract : The aim of this report is to explore different models of cosmology, depending on components as matter, radiation and dark energy. To be able to investigate the behaviour and age of these model universes, it is necessary to solve the Friedmann equation. READ MORE

5. 4. B-plane orbital resonance analysis and applications

   University essay from KTH/Rymdteknik

   Author : Alessandro Masat; [2020]
   Keywords : ;

   Abstract : Many space engineering and orbital mechanics applications seek for the usage of focused mathematical models, capable of providing useful insight onto particular phenomena or exploiting some theoretical and physical tools to reduce the computational costs and/or increase the level of accuracy reached. Orbital resonances are one of the phenomena that needs to be properly modelled, both for exploiting such features in the mission design phase and to predict possible resonant returns of threatening objects closely approaching a specified planet. READ MORE

6. 5. Simple cosmological models and their descriptions of the universe

   University essay from Linköpings universitet/Matematik och tillämpad matematik

   Author : Emil Gustafsson; [2018]
   Keywords : Tensors; General relativity; Einstein s field equations; Cosmology; Friedmann s equation; FLRW-spacetimes; Tensorer; Allmän relativitetsteori; Einsteins fältekvationer; Kosmologi; Friedmanns ekvation; FLRW-rumtider;

   Abstract : Cosmology is the study of the universe as a whole, and attempts to describe the behaviour of the universe mathematically. The simplest relativistic cosmological models are derived from Einstein's field equations with the assumptions of isotropy and homogeneity. READ MORE