24 citations · 83 across the 14 of their papers we have counts for
16 papers
No cosmic horizons from a strengthened higher-dimensional strong energy condition
Flavio Tonioni
Time-dependent supergravity compactifications lie beyond the setting of the Gibbons/Maldacena-Nuñez no-de Sitter theorem and can even support eternal cosmic acceleration, raising t…
Bounding axion dark energy
Gary Shiu, Flavio Tonioni, Hung V. Tran
We study cosmological solutions of (pseudo)scalar theories with periodic potentials, in the presence of arbitrary cosmological fluids -- including a cosmological constant of either…
Cosmological constraints from UV/IR mixing
Niccolò Cribiori, Flavio Tonioni
Holography and entropy bounds suggest that the ultraviolet (UV) and infrared (IR) cutoffs of gravitational effective theories are related to one another as a form of UV/IR mixing.…
Long-lived SEC violation via DM/DE couplings
Gary Shiu, Flavio Tonioni, Hung V. Tran
We discuss a cosmological scenario where an effective violation of the strong energy condition (SEC) is realized through a coupling between SEC-fulfilling dark matter (DM) and dark…
A mechanism for freezing moduli into Minkowski spacetime
Flavio Tonioni
We discuss FLRW-cosmologies with negatively-curved spatial slices that induce a late-time freezing of all the moduli of an effective field theory through Hubble friction, independe…
A distance conjecture beyond moduli?
Cédric Debusschere, Flavio Tonioni, Thomas Van Riet
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 specifi…
Analytic bounds on late-time axion-scalar cosmologies
Gary Shiu, Flavio Tonioni, Hung V. Tran
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…
Collapsing universe before time
Gary Shiu, Flavio Tonioni, Hung V. Tran
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-exponentia…
Connecting flux vacua through scalar field excursions
Gary Shiu, Flavio Tonioni, Vincent Van Hemelryck +1
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 separat…
Late-time attractors and cosmic acceleration
Gary Shiu, Flavio Tonioni, Hung V. Tran
We prove the conditions under which scaling cosmologies are inevitable late-time attractors of multi-field multi-exponential potentials, independently of initial conditions. The ad…
Accelerating universe at the end of time
Gary Shiu, Flavio Tonioni, Hung V. Tran
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 cosmo…
AdS scale separation and the distance conjecture
Gary Shiu, Flavio Tonioni, Vincent Van Hemelryck +1
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…
Modular invariance, misalignment and finiteness in non-supersymmetric strings
Niccolò Cribiori, Susha Parameswaran, Flavio Tonioni +1
In this article we show that finite perturbative corrections in non-supersymmetric strings can be understood via an interplay between modular invariance and misaligned supersymmetr…
Branes, fermions, and superspace dualities
Ander Retolaza, Jamie Rogers, Radu Tatar +1
We use the superspace formulation of supergravity in eleven and ten dimensions to compute fermion couplings on the M2-brane and on D-branes. In this formulation fermionic coupli…
Misaligned Supersymmetry and Open Strings
Niccolò Cribiori, Susha Parameswaran, Flavio Tonioni +1
The study of non-supersymmetric string theories is shedding light on an important corner of the string landscape and might ultimately explain why, so far, we did not observe supers…
Non-supersymmetric String Models from Anti-D3-/D7-branes in Strongly Warped Throats
Susha Parameswaran, Flavio Tonioni
This article discusses model-building scenarios including anti-D3-/D7-branes, in which supersymmetry is broken spontaneously, despite having no scale at which sparticles appear and…