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Induced gravitational waves from flipped SU(5) superstring theory at
Spyros Basilakos, Dimitri V. Nanopoulos, Theodoros Papanikolaou +2
The no-scale flipped SU(5) superstring framework constitutes a very promising paradigm for physics below the Planck scale providing us with a very rich cosmological phenomenology i…
Primordial Black Holes from No-Scale Supergravity
Dimitri V. Nanopoulos, Vassilis C. Spanos, Ioanna D. Stamou
We calculate the primordial black hole abundance in the context of a Wess-Zumino type no-scale supergravity model. We modify the Kähler potential, by adding an extra exponential te…
Post-Inflationary Gravitino Production Revisited
John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos +2
We revisit gravitino production following inflation. As a first step, we review the standard calculation of gravitino production in the thermal plasma formed at the end of post-inf…
D-Foam Phenomenology: Dark Energy, the Velocity of Light and a Possible D-Void
John Ellis, Nick E. Mavromatos, Dimitri V. Nanopoulos
In a D-brane model of space-time foam, there are contributions to the dark energy that depend on the D-brane velocities and on the density of D-particle defects. The latter may als…