Essays about: "Isabel Roca Vich"

Found 2 essays containing the words Isabel Roca Vich.

1. 1. Effect of chameleons on the mass of a galaxy cluster

   University essay from Uppsala universitet/Teoretisk astrofysik

   Author : Isabel Roca Vich; [2019]
   Keywords : Chameleons; modified gravity; galaxy cluster;

   Abstract : Chameleons are scalar fields coming from modied gravity theories and can be possible explanations for Dark Energy. They cause a fifth force and have a screening mechanism which allows this force to avoid solar system constraints. In this thesis, astrophysical consequences of the potential presence of the chameleon field will be studied. READ MORE

3. 2. How the ground state in a material will be affected by the spin-phonon interactions between nuclei in diatomic molecular structures

   University essay from Uppsala universitet/Materialteori

   Author : Isabel Roca Vich; [2016]
   Keywords : spin-phonon coupling; spin-phonon interactions;

   Abstract : Wave-like phonons are often used to describe the heat capacity in materials. In this report the spin-phonon interaction between nuclei in a diatomic molecular structure is introduced by looking at the Hamiltonian in its ground state. The corresponding Green's functions are computed in order to investigate how this interaction affects the phonons. READ MORE