" Non-Hermitian
Discrete Hamiltonians "
Gusein Sh.
Guseinov
(Atilim
University)
Abstract: The Hamiltonian H in quantum mechanics specifies the
energy levels and time evolution of quantum mechanical system. A standard axiom
of quantum mechanics requires that H
be Hermitian because Hermiticity guarantees that the energy spectrum is real
and that time evolution is unitary (probability-preserving). In the past
decade, non-Hermitian Hamiltonians and complex extension of quantum mechanics
received a lot of attention. Especially non- Hermitian Hamiltonians with real
spectrum are more meaningful in the description of the physical content of the
quantum systems defined by non-Hermitian Hamiltonians. In this talk, we
introduce a non-Hermitian discrete model and investigate conditions for
discreteness and reality of its spectrum.
Tea and cookies will be served before the
seminar.
Date: Tuesday,
December 11 2007
Time: 15.50
Place: Mathematics Seminar Room, SA-141