Sökning: "general relativity"
Visar resultat 1 - 5 av 53 uppsatser innehållade orden general relativity.
1. Gravitational Collapse of a Massless Scalar Field in a Theory of Minimally Modified Gravity
Master-uppsats, KTH/FysikSammanfattning : This thesis explores the spherically symmetric gravitational collapse of a massless scalar field in a minimally modified gravity theory denoted VCDM (V replaces $\Lambda$ in the $\Lambda$CDM abbreviation), a class of theories propagating the same degrees of freedom as general relativity at the expense of broken 4D diffeomorphism invariance. Numerical evolution of the equations of motion reveals that for small initial scalar profile amplitudes, no black hole forms from the collapse. LÄS MER
2. The Inflationary Universe
Kandidat-uppsats, Uppsala universitet/Teoretisk fysikSammanfattning : Astrophysical observations of the cosmic microwave background point to inconsistencies in the standard model of cosmology, and a primordial accelerated expansion of the universe known as inflation has been suggested as a solution. Unfortunately, observational evidence of inflation is lacking, and there exists hundreds of models that populate the inflationary landscape. LÄS MER
3. Classical Limits in Planetary Motion and Gravitational Radiation
Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)Sammanfattning : In this report, we analyze general relativistic effects on celestial bodies, including gravitational strength in different metrics, gravitational radiation, and frame-dragging. We present simulation methods for classical and general relativistic motion, through the use of systems of equations that may be numerically integrated. LÄS MER
4. Spatiotemporal Consciousness in Special Relativity
Master-uppsats, Umeå universitet/Institutionen för idé- och samhällsstudierSammanfattning : The experience of time passing is a fundamental part of the human experience, but what is the relationship between conscious experiences in time and the relativistic nature of space and time? It is natural to think that our phenomenal experiences are realised by neuralevents in our brains. And it seems plausible that the order of these neural events makes a difference to our phenomenology. LÄS MER
5. Gravitational Decoherence in Macroscopic Quantum Systems
Kandidat-uppsats, Uppsala universitet/Teoretisk fysikSammanfattning : 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. LÄS MER