Ja n 20 06 Can Gravitons Be Detected ?

0 60 10 43 v 1 1 1 Ja n 20 06 Can Gravitons Be Detected ?

Freeman Dyson has questioned whether any conceivable experiment in the real universe can detect a single graviton. If not, is it meaningful to talk about gravitons as physical entities? We attempt to answer Dyson’s question and find it is possible concoct an idealized thought experiment capable of detecting one graviton; however, when anything remotely resembling realistic physics is taken into...

ar X iv : h ep - t h / 05 01 14 3 v 1 1 9 Ja n 20 05 CCNY - HEP - 05 / 1 January 2005 A Note on MHV Amplitudes for Gravitons

We show how the maximally helicity violating (MHV) scattering amplitudes for gravitons can be related to current correlators and vertex operators in twistor space. This is similar to what happens in Yang-Mills theory and raises the possibility of a direct twistor-string-like construction for N = 8 supergravity.

Ja n 20 06 Adding high powered relations to large groups : A short proof of Lackenby ’ s result

ar X iv : m at h / 06 01 74 3 v 1 [ m at h . SP ] 3 0 Ja n 20 06 DETERMINANTS OF ZEROTH ORDER OPERATORS

ar X iv : a st ro - p h / 06 06 22 3 v 3 1 5 Ju n 20 06 Galaxy number counts in a presence of the graviton background

In the model of low-energy quantum gravity by the author, cosmological redshifts are caused by interactions of photons with gravitons. Non-forehead collisions with gravitons will lead to an additional relaxation of any photonic flux. Using only the luminosity distance and a geometrical one as functions of a redshift in this model, theoretical predictions for galaxy number counts are considered ...