L. Sorbo

Publications136
h-index33
Citations4,400
Highly Influential Citations190
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CMB-S4 Science Book, First Edition
This book lays out the scientific goals to be addressed by the next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated telescopes at the South…
Naturally inflating on steep potentials through electromagnetic dissipation
In models of natural inflation, the inflaton is an axionlike particle. Unfortunately, axion potentials in UV-complete theories appear to be too steep to drive inflation. We show that, even for a…
Science with the space-based interferometer LISA. IV: probing inflation with gravitational waves
We investigate the potential for the LISA space-based interferometer to detect the stochastic gravitational wave background produced from different mechanisms during inflation. Focusing on…
ECMO criteria for influenza A (H1N1)-associated ARDS: role of transpulmonary pressure
TLDR
Abnormalities of chest wall mechanics may be present in some patients with influenza A (H1N1)-associated ARDS and titrating PEEP to PPLATRS may overestimate the incidence of hypoxemia refractory to conventional ventilation leading to inappropriate use of ECMO.
A natural framework for chaotic inflation.
TLDR
It is shown that inflation with a quadratic potential occurs naturally in theories where an axionlike field mixes with a 4-form, and the axion can roll slowly towards its minimum, as in the simplest version of chaotic inflation.
Parity violation in the Cosmic Microwave Background from a pseudoscalar inflaton
If the inflaton is a pseudoscalar, then it naturally interacts with gauge fields through the coupling ∝ Fμν μν. Through this coupling, the rolling inflaton produces quanta of the gauge field, that in…
Adding helicity to inflationary magnetogenesis
The most studied mechanism of inflationary magnetogenesis relies on the time-dependence of the coefficient of the gauge kinetic term $F_{\mu\nu}\,{F}^{\mu\nu}$. Unfortunately, only extremely finely…
An ignoble approach to large field inflation
We study an inflationary model developed by Kaloper and Sorbo, in which the inflaton is an axion with a sub-Planckian decay constant, whose potential is generated by mixing with a topological 4-form…
Particle production during inflation and gravitational waves detectable by ground-based interferometers
Inflation typically predicts a quasi scale-invariant spectrum of gravitational waves. In models of slow-roll inflation, the amplitude of such a background is too small to allow direct detection…
Scale-dependent gravitational waves from a rolling axion
We consider a model in which a pseudo-scalar field $\sigma$ rolls for some e-folds during inflation, sourcing one helicity of a gauge field. These fields are only gravitationally coupled to the…
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