76 citations · 269 across the 8 of their papers we have counts for
14 papers · 1 filter
The clock ambiguity: Implications and new developments
Andreas Albrecht, Alberto Iglesias
We consider the ambiguity associated with the choice of clock in time reparameterization invariant theories. This arbitrariness undermines the goal of prescribing a fixed set of ph…
Fundamental Plasmid Strings and Black Rings
Jose J. Blanco-Pillado, Roberto Emparan, Alberto Iglesias
We construct excited states of fundamental strings that admit a semiclassical description as rotating circular loops of string. We identify them with the supergravity solutions for…
Mass Screening in Modified Gravity
Gregory Gabadadze, Alberto Iglesias
Models of modified gravity introduce extra degrees of freedom, which for consistency with the data, should be suppressed at observable scales. In the models that share properties o…
On Semiclassical Limits of String States
Jose J. Blanco-Pillado, Alberto Iglesias, Warren Siegel
We explore the relation between classical and quantum states in both open and closed (super)strings discussing the relevance of coherent states as a semiclassical approximation. Fo…
Perturbations of Self-Accelerated Universe
Cedric Deffayet, Gregory Gabadadze, Alberto Iglesias
We discuss small perturbations on the self-accelerated solution of the DGP model, and argue that claims of instability of the solution that are based on linearized calculations are…
(De)coupling Limit of DGP
Gregory Gabadadze, Alberto Iglesias
We investigate the decoupling limit in the DGP model of gravity by studying its nonlinear equations of motion. We show that, unlike 4D massive gravity, the limiting theory does not…