As a cosmologist, I’m interested in how the Universe works on the largest scales. The current dominant component in our Universe is dark energy, and this is the main focus of my research.
Dark energy is the name given to the substance that drives the late-time accelerating expansion of the Universe. There are many theories and models that try to describe dark energy in a way that fits with observational data. The standard model of cosmology is called the ΛCDM model, where dark energy is represented by the cosmological constant, Λ, and the other dark component of the Universe is CDM, or Cold Dark Matter.
The cosmological constant is the simplest explanation for dark energy, but the model has a number of flaws that drive theorists to look for alternative explanations for the late-time acceleration. A large competing class of models are called dynamical dark energy models, where, unlike in the cosmological constant model, the dark energy does not have a constant value.
At the moment, my research is focused on studying interacting vacuum dark energy models, where dark energy is modelled by a dynamical vacuum energy and dark matter can decay into the vacuum. I’m using the numerical codes CAMB, CosmoMC and Cobaya to analyse these models and make predictions that can be tested against observational data.