Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isospectral scattering for relativistic equivalent Hamiltonians on a
  coarse momentum grid   The scattering phase-shifts are invariant under unitary transformations of
the Hamiltonian. However, the numerical solution of the scattering problem that
requires to discretize the continuum violates this phase-shift invariance among
unitarily equivalent Hamiltonians. We extend a newly found prescription for the
calculation of phase shifts which relies only on the eigenvalues of a
relativistic Hamiltonian and its corresponding Chebyshev angle shift. We
illustrate this procedure numerically considering $\pi\pi$, $\pi N$ and $NN$
elastic interactions which turns out to be competitive even for small number of
grid points.

11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex