These authors also show that it is not easy to have just helicity excitations – typically one would
also generate helicity
and massless scalar excitations. This is what would happen, for instance, in
the emergent gravity scenario inspired in the phenomenology of 3He, which will be described
below.
http://www.livingreviews.org/lrr-2011-3 |
Living Rev. Relativity 14, (2011), 3
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