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These are the ways of describing de Sitter space that are useful when considering inflation. A de Sitter universe is a cosmological solution to the Einstein field equations of general relativity, named after Willem de Sitter. It models the universe as spatially flat and neglects ordinary matter, so the dynamics of the universe are dominated by the cosmological constant , thought to correspond to dark energy in our universe or the inflaton field in the early universe . The Herschel Space Observatory is a European Space Agency space observatory sensitive to the far infrared and submillimetre wavebands. The Herschel Observatory is capable of seeing the coldest and dustiest objects in space; for example, cool cocoons where stars form and dusty galaxies just starting to bulk up with new stars. [via NASA/JPL] It has been notoriously difficult to construct a meta-stable de Sitter (dS) vacuum in string theory in a controlled approximation. This suggests the possibility that meta-stable dS belongs to the swampland.

2014 — Nonperturbative infrared effects in de Sitter space - . takashi arai kek and nagoya university d3 arxiv:1111.6754. Baby sitter Song - . powerpoint 4 jan.

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This suggests the possibility that meta-stable dS belongs to the swampland. Disclaimer: I'm not 100% sure of the implications for cosmology since I never really studied cosmology. I know a little bit about de Sitter space from the dS/CFT conjecture, so I'll try to color my answer in that direction.

Vårt universum är en expanderande bubbla i en extra

−V. 2. =−1 ds. 2.

=dX. 2. dY.
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A Lorentzian manifold in Minkowski space which is the analogue of the sphere in ordinary Euclidean space .

2003 — En enda skadad keramplatta av de omkring 25000 plattorna i Keramplattorna har olika sammansättning och färg beroende var på rymdfärjan de sitter.
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Vårt universum är en expanderande bubbla i en extra

Souvik Banerjee (Institutionen för fysik och astronomi, Uppsala University, av S Ström · 1970 · Citerat av 5 — Annales de l'I.H.P. Physique théorique, Tome 13 (1970) no. [2] O. Nachtmann, Quantum theory in de Sitter space, preprint, Institute for Theoretical Physics, Chaos and complementarity in de Sitter space.

De Sitter Space och Cosmology - Vetenskap 2020

In this module we derive constant curvature de Sitter and anti de Sitter solutions of the Einstein equations with non-zero cosmological constant. We describe the geometric and causal properties of such space-times and provide their Penrose-Carter diagrams. We provide coordinate systems which cover various patches of these space-times. The realization of de Sitter space as a state, and not as a vacuum, resolves many issues associated with its entropy, zero-point energy and trans-Planckian censorship, amongst other things. Glauber-Sudarshan states, sometimes simply referred to as Glauber states, or alternatively as coherent and squeezed-coherent states, are interesting states De-Sitter space-time is the maximally symmetric vacuum solution of Einstein's equations in general relativity with a positive cosmological constant. In (3+1) dimension, it is a cosmological model The de Sitter metric describes an exponentially expanding universe.

De sitter 10 stycken längst ut på våra lemmar och är liksom av hårt växande material. Negative Space Nail Art To Show Your Manicurist Minimalistiska Naglar, 2 dec. 2020 — Informationsteknik förvärvar Mindspace Group AB får personlig service oavsett var de sitter”, avslutar Patrik Camp VD på Informationsteknik.