# String gases and the swampland

@article{Laliberte2020StringGA, title={String gases and the swampland}, author={Samuel Laliberte and Robert Brandenberger}, journal={Journal of Cosmology and Astroparticle Physics}, year={2020}, volume={2020}, pages={046 - 046} }

In this paper, we study some aspects of moduli stabilization using string gases in the context of the Swampland. In the framework which we derive, the matter Lagrangian for string gases yields a potential for the size moduli which satisfies the de Sitter conjecture with the condition |∇ V|/V ⩾ 1/√p 1/Mp, where p is the number of compactified dimensions. Moreover, the moduli find themselves stabilized at the self-dual radius, and gravity naturally emerges as the weakest force.

## 11 Citations

### Note on shape moduli stabilization, string gas cosmology and the swampland criteria

- PhysicsThe European physical journal. C, Particles and fields
- 2021

The resulting effective potential for these fields is determined and it is shown that it obeys the de Sitter conjecture, one of the swampland criteria for effective field theories to be consistent with superstring theory.

### Low energy models of string theory

- Physics, Mathematics
- 2022

String theory is the prime candidate for the theory of everything. However, it must be defined in ten dimensions to be consistent. To get 4D physics, the 6 other dimensions should be curled up in a…

### Intermediate class of warm pseudoscalar inflation

- PhysicsThe European Physical Journal C
- 2021

High dissipative regime of warm pseudoscalar inflation model (Kamali in Phys Rev D 100:043520, arXiv:1901.01897 [gr-qc], 2019) with an approximately constant value of dissipation parameter Q is…

### String length constraining from the stochastic gravitational waves background

- Physics
- 2021

We study the stochastic gravitational waves from string gas cosmology. With the help of the Lambert W function, we derive the exact energy density spectrum of the stochastic gravitational waves in…

### Contracting cosmologies and the swampland

- PhysicsJournal of High Energy Physics
- 2021

Abstract
We consider the cosmology obtained using scalar fields with a negative potential energy, such as employed to obtain an Ekpyrotic phase of contraction. Applying the covariant entropy bound…

### Viable curvaton models from the fNL parameter

- Physics
- 2020

We show how to build a curvaton inflationary model motivated by scale-dependent non-Gaussianities of cosmological perturbations. In particular, we study the change of sign in the $f_{NL}$ parameter…

### Thermal, trapped and chromo-natural inflation in light of the swampland criteria and the trans-Planckian censorship conjecture

- Economics
- 2020

We consider thermal, trapped and chromo-natural inflation in light of the swampland criteria and the Trans-Planckian Censorship Conjecture (TCC). Since thermal inflation occurs at energies low…

### Creating spatial flatness by combining string gas cosmology and power law inflation

- Physics
- 2020

We show that it is possible to combine an early phase of String Gas Cosmology which can explain the origin of the observed structures on cosmological scales with a short later period of power law…

### Strengthening the de Sitter swampland conjecture in warm inflation

- EconomicsJournal of High Energy Physics
- 2020

Abstract
The de Sitter constraint on the space of effective scalar field theories consistent with superstring theory provides a lower bound on the slope of the potential of a scalar field which…

### Strengthening the TCC bound on inflationary cosmology

- Physics, EconomicsJournal of Cosmology and Astroparticle Physics
- 2020

We show that the constraints which follow from the Trans-Planckian Censorship Conjecture for inflationary cosmology can be strengthened if the pre-inflationary period the universe was dominated by…

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