235 citations · 2.5k across the 71 of their papers we have counts for
73 papers
SU(3)-structures on quotients of 3-Sasakian orbifolds
Quentin Peres, Dimitrios Tsimpis
We show that if is a quasi-regular -Sasakian orbifold of dimension , then its quotient by one of the Reeb vector fields inherits an -structure…
Analytic results for slow-roll curved-space inflation and exponential potentials
Dimitrios Tsimpis, Govind Venugopal
We derive analytic templates for the scalar and tensor primordial power spectra describing cosmologies that transition from kinetic dominance to slow-roll inflation in the presence…
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…