Browsing Departament de Física Quàntica i Astrofísica by Title

Now showing items 37-40 of 40

Towards a non-perturbative description of cosmological inflation

Cruces Mateo, Diego (Date of defense: 2023-12-13)

[eng] From the observation of the cosmic microwave background radiation (CMBR) we know that the universe is isotropic on scales larger than ∼ 75 Megaparsec to at least one part in 100000. The leading paradigm for explaining ...

Vacuum Energy in Quantum Field Theory and Cosmology

Gómez Valent, Adrià (Date of defense: 2017-09-12)

The cosmological constant appearing in Einstein’s equations is a key element of the ΛCDM standard cosmological model. This term performs, effectively, as pure vacuum energy, and is considered the easiest explanation of the ...

Variational quantum architectures. Applications for noisy intermediate-scale quantum computers

Bravo Prieto, Carlos (Date of defense: 2022-06-20)

Quantum algorithms showing promising speedups with respect to their classical counterparts already exist. However, noise limits the quantum circuit depth, making the practical implementation of many such quantum algorithms ...

Wave propagation in metamaterials mimicking spacetime geometry: black holes and cosmic strings

Fernández Núñez, Isabel (Date of defense: 2018-07-19)

In physics, it is common to find different phenomena being described by similar equations. A good analogy can make us look at a problem from a different point of view. In that way, ideas may be transferred from one field ...