Zobrazeno 1 - 10
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pro vyhledávání: '"Tonioni, Flavio"'
Autor:
Tonioni, Flavio
We discuss FLRW-cosmologies with negatively-curved spatial slices that induce a late-time stabilization of all the moduli of an effective field theory through Hubble friction, independently of the moduli-space curvature. This holds for pure moduli, w
Externí odkaz:
http://arxiv.org/abs/2407.21104
The distance conjecture states that for theories with moduli coupled to gravity a tower of states becomes light exponentially in the geodesic distance in moduli space. This specifies how effective field theories break down for large field values. How
Externí odkaz:
http://arxiv.org/abs/2407.03715
The cosmological dynamics of multiple scalar/pseudoscalar fields are difficult to solve, especially when the field-space metric is curved. This presents a challenge in determining whether a given model can support cosmic acceleration, without solving
Externí odkaz:
http://arxiv.org/abs/2406.17030
In this note, we prove analytic bounds on the equation of state of a cosmological fluid composed of an arbitrary number of canonical scalars evolving in a negative multi-exponential potential. Because of the negative energy, the universe is contracti
Externí odkaz:
http://arxiv.org/abs/2312.06772
We show how flux vacua that differ from each other in flux quanta can be seen as different vacua in a single scalar potential of an enlarged field space, which resolves the separation by thin domain walls. This observation, which is motivated by the
Externí odkaz:
http://arxiv.org/abs/2311.10828
We prove the conditions under which scaling cosmologies are inevitable late-time attractors of multi-field multi-exponential potentials, independently of initial conditions. The advantage of such scaling cosmologies is that the time dependence of the
Externí odkaz:
http://arxiv.org/abs/2306.07327
We investigate whether an accelerating universe can be realized as an asymptotic late-time solution of FLRW-cosmology with multi-field multi-exponential potentials. Late-time cosmological solutions exhibit a universal behavior which enables us to bou
Externí odkaz:
http://arxiv.org/abs/2303.03418
It has been argued that orientifold vacua with fluxes in type IIA string theory can achieve moduli stabilisation and arbitrary decoupling between the AdS and KK scales upon sending certain unconstrained RR-flux quanta to infinity. In this paper, we f
Externí odkaz:
http://arxiv.org/abs/2212.06169
In this article we show that finite perturbative corrections in non-supersymmetric strings can be understood via an interplay between modular invariance and misaligned supersymmetry. While modular invariance is known to be crucial in closed-string mo
Externí odkaz:
http://arxiv.org/abs/2110.11973
Publikováno v:
J. High Energ. Phys. 2021, 243 (2021)
We use the superspace formulation of supergravity in eleven and ten dimensions to compute fermion couplings on the M2-brane and on D$p$-branes. In this formulation fermionic couplings arise naturally from the $\theta$-expansion of the superfields fro
Externí odkaz:
http://arxiv.org/abs/2106.02090