163 citations · 178 across the 18 of their papers we have counts for
5 papers · 1 filter
Exponential of a Matrix, a Nonlinear Problem and Quantum Gates
Willi-Hans Steeb, Yorick Hardy
We describe solutions of the matrix equation , where . Applications in quantum computing are given. Both normal and nonnormal matrices are stud…
Majorana Fermions on a Lattice and a Matrix Problem
Yorick Hardy, Willi-Hans Steeb
We investigate matrix problems arising in the study of Majorana Fermions on a lattice.
Cayley transform and the Kronecker product of Hermitian matrices
Yorick Hardy, Ajda Fošner, Willi-Hans Steeb
We consider the conditions under which the Cayley transform of the Kronecker product of two Hermitian matrices can be again presented as a Kronecker product of two matrices and, if…
An Eigenvalue Problem for a Fermi System and Lie Algebras
Willi-Hans Steeb, Yorick Hardy
We study a Fermi Hamilton operator which does not commute with the number operator . The eigenvalue problem and the Schrödinger equation is solved. Entanglement is…
Exceptional Points, Nonnormal Matrices, Hierarchy of Spin Matrices and an Eigenvalue Problem
Willi-Hans Steeb, Yorick Hardy
Exceptional points of a class of non-hermitian Hamilton operators of the form are studied, where and are hermitian operat…