Review of some promising fractional physical models
VE Tarasov - International Journal of Modern Physics B, 2013 - World Scientific
Fractional dynamics is a field of study in physics and mechanics investigating the behavior
of objects and systems that are characterized by power-law nonlocality, power-law long-term …
of objects and systems that are characterized by power-law nonlocality, power-law long-term …
[HTML][HTML] Ghost-free infinite derivative quantum field theory
In this paper we will study Lorentz-invariant, infinite derivative quantum field theories, where
infinite derivatives give rise to non-local interactions at the energy scale M s, beyond the …
infinite derivatives give rise to non-local interactions at the energy scale M s, beyond the …
Cosmology of the Lifshitz universe
G Calcagni - Journal of High Energy Physics, 2009 - iopscience.iop.org
We study the ultraviolet complete non-relativistic theory recently proposed by Hořava. After
introducing a Lifshitz scalar for a general background, we analyze the cosmology of the …
introducing a Lifshitz scalar for a general background, we analyze the cosmology of the …
Quantum field theory, gravity and cosmology in a fractal universe
G Calcagni - Journal of High Energy Physics, 2010 - Springer
We propose a model for a power-counting renormalizable field theory living in a fractal
spacetime. The action is Lorentz covariant and equipped with a Stieltjes measure. The …
spacetime. The action is Lorentz covariant and equipped with a Stieltjes measure. The …
Langevin equation with two fractional orders
A new type of fractional Langevin equation of two different orders is introduced. The
solutions for this equation, known as the fractional Ornstein–Uhlenbeck processes, based …
solutions for this equation, known as the fractional Ornstein–Uhlenbeck processes, based …
Geometry and field theory in multi-fractional spacetime
G Calcagni - Journal of High Energy Physics, 2012 - Springer
A bstract We construct a theory of fields living on continuous geometries with fractional
Hausdorff and spectral dimensions, focussing on a flat background analogous to Minkowski …
Hausdorff and spectral dimensions, focussing on a flat background analogous to Minkowski …
Quantum scalar field theories with fractional operators
G Calcagni - Classical and Quantum Gravity, 2021 - iopscience.iop.org
We study a class of perturbative scalar quantum field theories where dynamics is
characterized by Lorentz-invariant or Lorentz-breaking non-local operators of fractional …
characterized by Lorentz-invariant or Lorentz-breaking non-local operators of fractional …
Ultraviolet-complete quantum field theories with fractional operators
G Calcagni, L Rachwał - Journal of Cosmology and Astroparticle …, 2023 - iopscience.iop.org
We explore quantum field theories with fractional d'Alembertian□ γ. Both a scalar field
theory with a derivative-dependent potential and gauge theory are super-renormalizable for …
theory with a derivative-dependent potential and gauge theory are super-renormalizable for …
Nonlocality in string theory
We discuss an aspect of string theory which has been tackled from many different
perspectives, but incompletely: the role of nonlocality in the theory and its relation to the …
perspectives, but incompletely: the role of nonlocality in the theory and its relation to the …
Nonlocal scalar quantum field theory from causal sets
A bstract We study a non-local scalar quantum field theory in flat spacetime derived from the
dynamics of a scalar field on a causal set. We show that this non-local QFT contains a …
dynamics of a scalar field on a causal set. We show that this non-local QFT contains a …