## ** Miloslav Znojil:
**

#
********************************************
**

### * "Energy-dependent
Hamiltonians and quasi-Hermiticity"
*

##
*
*

#
********************************************
**

Effective (i.e., subspace-constrained) Hamiltonians become, by
construction, energy-dependent while all the energy-dependent
forces prove non-linear because the energy itself is merely an
eigenvalue of the Hamiltonian H. One of the most natural
resolutions of such a puzzle is proposed via an introduction of
the two separate linear representatives of the respective right
and left action of H=H(E). Both the new energy-independent
operators are quasi-Hermitian so that the formalism admits a natural
extension to all the quasi-Hermitian initial H(E)s.

return upwards

*Updated: March 31, 2004*