Bimetric gravity from ghost-free massive gravity
- Sayed Fawad Hassan, Rachel A. Rosen
- Physics
- 16 September 2011
A bstractGenerically, non-linear bimetric theories of gravity suffer from the same Boulware-Deser ghost instability as non-linear theories of massive gravity. However, recently proposed theories of…
Interacting spin-2 fields
- Kurt Hinterbichler, Rachel A. Rosen
- Physics, Geology
- 26 March 2012
A bstractWe construct consistent theories of multiple interacting spin-2 fields in arbitrary spacetime dimensions using a vielbein formulation. We show that these theories have the additional primary…
On non-linear actions for massive gravity
- Sayed Fawad Hassan, Rachel A. Rosen
- Mathematics
- 30 March 2011
In this work we present a systematic construction of the potentially ghost-free non-linear massive gravity actions. The most general action can be regarded as a 2-parameter deformation of a minimal…
Resolving the ghost problem in nonlinear massive gravity.
- Sayed Fawad Hassan, Rachel A. Rosen
- PhysicsPhysical Review Letters
- 16 June 2011
It is shown that, in the entire two-parameter family of actions, the Hamiltonian constraint is maintained at the complete nonlinear level and this implies the absence of the pathological Boulware-Deser ghost to all orders.
Ghost-free massive gravity with a general reference metric
- Sayed Fawad Hassan, Rachel A. Rosen, A. Schmidt-May
- Geology, Physics
- 15 September 2011
A bstractTheories of massive gravity inevitably include an auxiliary reference metric. Generically, they also contain an inconsistency known as the Boulware-Deser ghost. Recently, a family of…
Confirmation of the secondary constraint and absence of ghost in massive gravity and bimetric gravity
- Sayed Fawad Hassan, Rachel A. Rosen
- Physics, Geology
- 8 November 2011
A bstractIn massive gravity and in bimetric theories of gravity, two constraints are needed to eliminate the two phase-space degrees of freedom of the Boulware-Deser ghost. For recently proposed…
More on gapped Goldstones at finite density: more gapped Goldstones
- A. Nicolis, R. Penco, F. Piazza, Rachel A. Rosen
- Physics
- 5 June 2013
A bstractIt was recently argued that certain relativistic theories at finite density can exhibit an unconventional spectrum of Goldstone excitations, with gapped Goldstones whose gap is exactly…
Note on ghost-free matter couplings in massive gravity and multigravity
- Kurt Hinterbichler, Rachel A. Rosen
- Geology
- 23 March 2015
We consider a recently proposed non-minimal matter coupling in massive gravity and multi-gravity. We argue that, when formulated in terms of unconstrained vielbeins, this matter coupling contains the…
Fabrication and Properties of Composites of Poly(ethylene oxide) and Functionalized Carbon Nanotubes
- H. Geng, Rachel A. Rosen, O. Zhou
- Materials Science
- 2 October 2002
Abstract : We show that composites with improved uniformity and dispersion can be formed using chemically functionalized carbon nanotubes. A significant enhancement of the mechanical properties was…
Effective field theory for quantum liquid in dwarf stars
- G. Gabadadze, Rachel A. Rosen
- Physics
- 29 December 2009
An effective field theory approach is used to describe quantum matter at greater-than-atomic but less-than-nuclear densities which are encountered in white dwarf stars. We focus on the density and…
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