Detecting Vanishing Dimensions Via Primordial Gravitational Wave Astronomy
arXiv:1102.3434 · doi:10.1103/PhysRevLett.106.101101
Abstract
Lower-dimensionality at higher energies has manifold theoretical advantages as recently pointed out. Moreover, it appears that experimental evidence may already exists for it - a statistically significant planar alignment of events with energies higher than TeV has been observed in some earlier cosmic ray experiments. We propose a robust and independent test for this new paradigm. Since (2+1)-dimensional spacetimes have no gravitational degrees of freedom, gravity waves cannot be produced in that epoch. This places a universal maximum frequency at which primordial waves can propagate, marked by the transition between dimensions. We show that this cut-off frequency may be accessible to future gravitational wave detectors such as LISA.
Somewhat expanded version with discussions that could not fit into the PRL version; references added
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- Lower-Dimensional Black Hole Chemistry
- Dirac fermions in strong gravitational fields
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