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20022009
most citedDynamics of dark energy

6.3k citations

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18 papers · 1 filter

hep-th20097 cited

The Physics of Q-balls

Mitsuo I. Tsumagari

In this thesis we investigate the stationary properties and formation process of a class of nontopological solitons, namely Q-balls. We explore both the quantum-mechanical and clas…

hep-th200964 cited

On the full quantum trispectrum in multi-field DBI inflation

Shuntaro Mizuno, Frederico Arroja, Kazuya Koyama

We compute the leading order connected four-point function of the primordial curvature perturbation coming from the four-point function of the fields in multi-field DBI inflation m…

hep-th2009356 cited

Strong coupling in Horava gravity

Christos Charmousis, Gustavo Niz, Antonio Padilla +1

By studying perturbations about the vacuum, we show that Horava gravity suffers from two different strong coupling problems, extending all the way into the deep infra-red. The firs…

hep-th200959 cited

Lorentz boost and non-Gaussianity in multi-field DBI-inflation

Shuntaro Mizuno, Frederico Arroja, Kazuya Koyama +1

We show that higher-order actions for cosmological perturbations in the multi-field DBI-inflation model are obtained by a Lorentz boost from the rest frame of the brane to the fram…

hep-th200938 cited

Q-balls in flat potentials

Edmund J. Copeland, Mitsuo I. Tsumagari

We study the classical and absolute stability of Q-balls in scalar field theories with flat potentials arising in both gravity-mediated and gauge-mediated models. We show that the…

hep-th200820 cited

On the stability and spectrum of non-supersymmetric AdS(5) solutions of M-theory compactified on Kahler-Einstein spaces

Jonathan E. Martin, Harvey S. Reall

Eleven-dimensional supergravity admits non-supersymmetric solutions of the form AdS(5)xM(6) where M(6) is a positive Kahler-Einstein space. We show that the necessary and sufficien…