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Brane inflation predicts the production of cosmic superstrings with tension 10 ∼ Gμ ∼ 10. Superstring theory predicts also the existence of a dilaton with a mass that is at most of the order of the… (More)

- Eugeny Babichev, Vyacheslav Dokuchaev, Yu. Eroshenko
- 2004

Dark energy with the usually used equation of state p = wρ, where w = const < 0 is hydrodynamically unstable. To overcome this drawback we consider the cosmology of a perfect fluid with a linear… (More)

- Eugeny Babichev, Cedric Deffayet, Gilles Esposito-Farèse
- Physical review letters
- 2011

We show that the current bounds on the time variation of the Newton constant G can put severe constraints on many interesting scalar-tensor theories which possess a shift symmetry and a nonminimal… (More)

We investigate static spherically symmetric solutions of nonlinear massive gravities. We first identify, in an ansatz appropriate to the study of those solutions, the analog of the decoupling limit… (More)

Eugeny Babichev ∗ and Alessandro Fabbri † Laboratoire de Physique Théorique d’Orsay, Bâtiment 210, Université Paris-Sud 11, F-91405 Orsay Cedex, France Museo Storico della Fisica e Centro Studi e… (More)

- Eugeny Babichev, Cedric Deffayet, R. Ziour
- Physical review letters
- 2009

We obtain static, spherically symmetric, and asymptotically flat numerical solutions of massive gravity with a source. Those solutions show, for the first time explicitly, a recovery of the… (More)

- Eugeny Babichev, Alexander Vikman
- 2008

The k-essence theories admit in general the superluminal propagation of the perturbations on classical backgrounds. We show that in spite of the superluminal propagation the causal paradoxes do not… (More)

- Eugeny Babichev, Viatcheslav Mukhanov, Alexander Vikman

In our previous work 1 we have shown that it is principally possible to send information from the interior of a black hole (BH) without modifying Hilbert-Einstein action a. This may happen provided a… (More)

- Eugeny Babichev, Vyacheslav Dokuchaev, Yu. N. Eroshenko
- 2005

The stationary, spherically symmetric accretion of dark energy onto a Schwarzschild black hole is considered in terms of relativistic hydrodynamics. The approximation of an ideal fluid is used to… (More)

We derived expressions for energy, momentum and angular momentum losses due to gravitational and electromagnetic radiation from the closed superconducting chiral cosmic strings of arbitrary form. The… (More)