852 citations · 16.2k across the 260 of their papers we have counts for
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Towards singularity and ghost free theories of gravity
Tirthabir Biswas, Erik Gerwick, Tomi Koivisto +1
We present the most general covariant ghost-free gravitational action in a Minkowski vacuum. Apart from the much studied f(R) models, this includes a large class of non-local actio…
Observable gravitational waves from inflation with small field excursions
Shaun Hotchkiss, Anupam Mazumdar, Seshadri Nadathur
The detection of primordial gravitational waves, or tensor perturbations, would be regarded as compelling evidence for inflation. The canonical measure of this is the ratio of tens…
The curvaton scenario in the MSSM and predictions for non-Gaussianity
Anupam Mazumdar, Seshadri Nadathur
We provide a model in which both the inflaton and the curvaton are obtained from within the minimal supersymmetric Standard Model, with known gauge and Yukawa interactions. Since n…
The origin of dark matter, matter-anti-matter asymmetry, and inflation
Anupam Mazumdar
A rapid phase of accelerated expansion in the early universe, known as inflation, dilutes all matter except the vacuum induced quantum fluctuations. These are responsible for seedi…
Could our Universe have begun with Negative Lambda?
Tirthabir Biswas, Tomi Koivisto, Anupam Mazumdar
In this paper we present an informal description of the Cyclic Inflation scenario which allows our universe to "start" with a negative potential energy, inflate, and then gracefull…
Inflation with large supergravity corrections
Anupam Mazumdar, Seshadri Nadathur, Philip Stephens
It is well known that large Hubble-induced supergravity corrections to the inflaton field can ruin the flatness of the potential, thus creating a tension between slow-roll inflatio…