J. G. Russo

Accelerating Branes and Brane Temperature (2008)

Russo, J. G., Townsend, P. K.

We define the local acceleration and jerk of a relativistic brane in an ambient spacetime, and construct from them a dimensionless parameter lambda that must be small for an interpretation of brane...

Cosmological D-instantons and cyclic universes (2005)

Roest, D., Collinucci, A., Bergshoeff, E.A., Russo, J.G., Townsend, P.K.

For models of gravity coupled to hyperbolic sigma models, such as the metric-scalar sector of IIB supergravity, we show how smooth trajectories in the ‘augmented target space’ connect FLRW...

Classical resolution of singularities in dilaton cosmologies (2005)

Roest, D., Collinucci, A., Bergshoeff, E.A., Russo, J.G., Townsend, P.K.

For models of dilaton gravity with a possible exponential potential, such as the tensor–scalar sector of IIA supergravity, we show how cosmological solutions correspond to trajectories in a 2D...

Exactly solvable string models of curved space-time backgrounds (1995)

Russo, J. G., Tseytlin, A. A.

We consider a new 3-parameter class of exact 4-dimensional solutions in closed string theory and solve the corresponding string model, determining the physical spectrum and the partition function....