HIP NEWS October 19th 2015
HIP Staff News
Dr. Mikko Voutilainen has been appointed
as assistant professor (tenure-track)
in experimental particle physics at
the University of Helsinki starting
Nov. 1st, 2015.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
Tuesday 20 October 2015 at 10.15 in A315
Timo Alho (Reykjavik)
Geometric Algebra: a coordinate free formalism for inner product spaces
Abstract: Geometric Algebra (GA) is a mathematical system defined by
imbuing the vectors of an inner product space directly with the
Clifford algebra generated by the inner product, without considering a
separate representation of the algebra operating on the vectors. This
simple change in point of view gives a system which generalizes
exterior algebra, quaternions, spinors, and many other algebras used in
theoretical physics, while simplifying both concepts and calculations.
This talk will open a brief course on the algebra and its extension to
geometric calculus. During the talk we will primarily give elementary
details of the formalism, with more advanced topics to be handled later
during the course. Some applications are pointed out for motivation.
Wednesday 21 October 2015 at 14:15 in A315
Hannu Nyrhinen (Helsinki)
Story of bimetric variational formalism
Abstract: Bimetric variational formalism was introduced a while ago to construct
novel bimetric gravity models. In these models an affine connection is generated
by an additional tensor field which is independent of the physical metric.
In this talk I will describe the ideas behind the bimetric variational formalism
and some results preceding our work (in JCAP05(2015)021). Namely, we addressed
the issue of ghosts plaguing many bimetric models. Previous work had hinted of a
possibility of removing such unstable degrees of freedom from these theories.
I will show how using the ADM decomposition it is possible to study these models
and the behaviour of their degrees of freedom.
H2020 Marie Sklodowska-Curie ITN info session for the 2016 call applicants
Time: 29.10.2015 at 13-15
Further information on MSCA is available on
A. Cabo 2.10. – 27.10. (AT)