235 citations · 2.5k across the 71 of their papers we have counts for
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Universal Cosmologies
Paul Marconnet, Dimitrios Tsimpis
Universal cosmologies are exact solutions of 10d type IIA supergravity containing a 4d Friedmann-Lemaître-Robertson-Walker factor, that can also be repackaged as solutions of 4d mo…
Holographic deformations of matrix models
Alfred Bovon, Henning Samtleben, Dimitrios Tsimpis
We study maximal supergravity in two dimensions, obtained from reduction of IIA supergravity on an sphere. The theory captures the low-lying fluctuations around the non-confo…
Exponential Quintessence: curved, steep and stringy?
David Andriot, Susha Parameswaran, Dimitrios Tsimpis +2
We explore the possibility that our universe's current accelerated expansion is explained by a quintessence model with an exponential scalar potential, , keepi…
Accelerated expansion of an open universe, and string theory realizations
David Andriot, Dimitrios Tsimpis, Timm Wrase
Recently, many works have tried to realize cosmological accelerated expansion in string theory models in the asymptotic regions of field space, with a typical scalar potential $V(φ…
Universal accelerating cosmologies from 10d supergravity
Paul Marconnet, Dimitrios Tsimpis
We study 4d Friedmann-Lemaître-Robertson-Walker cosmologies obtained from time-dependent compactifications of Type IIA 10d supergravity on various classes of 6d manifolds (Calabi-Y…
Dirac operator spectrum on a nilmanifold
Aldo Deandrea, Fabio Dogliotti, Dimitrios Tsimpis
We obtain the spectrum of the Dirac operator on the three-dimensional Heisenberg nilmanifold , and its complete dependence on the metric moduli. As an application, w…