1,199 research outputs found
An efficient quantum algorithm for the hidden subgroup problem in extraspecial groups
Extraspecial groups form a remarkable subclass of p-groups. They are also
present in quantum information theory, in particular in quantum error
correction. We give here a polynomial time quantum algorithm for finding hidden
subgroups in extraspecial groups. Our approach is quite different from the
recent algorithms presented in [17] and [2] for the Heisenberg group, the
extraspecial p-group of size p3 and exponent p. Exploiting certain nice
automorphisms of the extraspecial groups we define specific group actions which
are used to reduce the problem to hidden subgroup instances in abelian groups
that can be dealt with directly.Comment: 10 page
Almost all extraspecial p-groups are Swan groups
Let P be an extraspecial p-group which is neither dihedral of order 8, nor of
odd order p^3 and exponent p. Let G be a finite group having P as a Sylow
p-subgroup. Then the mod-p cohomology ring of G coincides with that of the
normalizer N_G(P).Comment: 5 page
Semi-extraspecial groups with an abelian subgroup of maximal possible order
Let be a prime. A -group is defined to be semi-extraspecial if for
every maximal subgroup in the quotient is a an extraspecial
group. In addition, we say that is ultraspecial if is semi-extraspecial
and . In this paper, we prove that every -group of
nilpotence class is isomorphic to a subgroup of some ultraspecial group.
Given a prime and a positive integer , we provide a framework to
construct of all the ultraspecial groups order that contain an abelian
subgroup of order . In the literature, it has been proved that every
ultraspecial group order with at least two abelian subgroups of
order can be associated to a semifield. We provide a generalization of
semifield, and then we show that every semi-extraspecial group that is the
product of two abelian subgroups can be associated with this generalization of
semifield
The -Euler characteristic of extraspecial -groups.
Let p be an odd prime, and let K(n)* denote the nth Morava K-theory at the prime p; we compute
the K(n)-Euler characteristic \chi_{n;p}(G) of the classifying space of an extraspecial p-group G.
Equivalently, we get the number of conjugacy classes of commuting n-tuples in the group G.
We obtain this result by examining the lattice of isotropic subspaces of an even-dimensional
Fp-vector space with respect to a non-degenerate alternating form B
- …