5,033 research outputs found
Fermionic Bound States and Pseudoscalar Exchange
We discuss the possibility that fermions bind due to Higgs or pseudoscalar
exchange. It is reasonable to believe on qualitative grounds that this can
occur for fermions with a mass larger than 800-900 GeV. An exchange of a
pseudoscalar boson leads in the non-relativistic limit to an unacceptable
potential which behaves like 1/r^3 at the origin. We show that this singular
behaviour is smeared out when relativistic effects are included
Analytical theory for dark soliton interaction in nonlocal nonlinear materials with arbitrary degree of nonlocality
We investigate theoretically the interaction of dark solitons in materials
with a spatially nonlocal nonlinearity. In particular we do this analytically
and for arbitrary degree of nonlocality. We employ the variational technique to
show that nonlocality induces an attractive force in the otherwise repulsive
soliton interaction.Comment: submitted for publicatio
Analytical theory of dark nonlocal solitons
We investigate properties of dark solitons in nonlocal materials with an
arbitrary degree of nonlocality. We employ the variational technique and
describe the dark solitons, for the first time, in the whole range of degree of
nonlocality.Comment: to be published in Optics Letter
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