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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Maths HEP Lunchtime Seminars: Defect Formation with Bulk Fields

Presented by Horace Stoica, Imperial

16 March 2007 13:00 in CM221

Topological defects are expected to be formed
at the end of brane inflation, when a brane and
and anti-brane collide and annihilate. The
formation of these topological defects can
be described by the evolution of a scalar
field, the tachyon, which lives inside the
worldvolume of the brane-anti-brane system.
Traditionally, studies of the tachyon evolution
have ignored the coupling with bulk fields,
fields which can propagate in the entire
space-time.
We investigate the effect of the bulk fields
on the formation and evolution of topological
defects both analytically and by lattice simulations.
While the formation of the defects is only
weakly influenced by the bulk fields, their
evolution changes radically. The bulk fields
can mediate long-range interactions between
the defects, effectively causing local defects
to behave like global ones.

Contact daniele.dorigoni@durham.ac.uk or jyotirmoy.bhattacharya@durham.ac.uk for more information