HOMO	Highest occupied molecular orbital
LUMO	Lowest unoccupied molecular orbital
${\mathcal{E}}_0$	Amplitude of the electric field of a probe pulse
$t_p$	Pump-probe time delay
${\omega }_{in}$	Central frequency of a probe pulse
$\mathbf{k}$	Wave vector of a probe pulse
$ϵ$	Polarization vector of a probe pulse
$\tau$	Probe pulse duration
$\tilde{m}$	Index for the initially excited molecule
j	Index for the atom j
m	Index for the molecule m
U	Coulomb energy of an electron-hole pair localized on a single site
V	Coupling between nearest-neighbor molecules
$h_{inter}$	Degree of the exciton intersite delocalization
${\tilde{c}}_n$	Expansion coefficients of the representation of the time-dependent wave function as eigenstates
$c_n^m$	Expansion coefficients of the representation of the eigenstates of Frenkel Hamiltonian as basis states
$a_{nm}$	Expansion coefficients of the solution of the time-dependent Schrödinger equation
$d_j$	Transition matrix element between core electron orbital of the atom j of molecule m and
	HOMO of the same molecule
${\overline{d}}_j$	Transition matrix element between core electron orbital of the atom j of the molecule m and
	HOMO of the next-neighbor molecules
$d_j^{\prime }$	Transition matrix element between core electron orbital of the atom j of the molecule m and
	LUMO of the same molecule
${\overline{d}}_j^{\prime }$	Transition matrix element between core electron of the atom j of the molecule m and
	LUMO of the next-neighbor molecules
$|{\varphi }_0^m\rangle$	Ground state of the molecule m
$|{\mathsf{\Psi }}_0\rangle$	Ground state of a chain of molecules
$|{\varphi }_{\ast }^m\rangle$	State which corresponds to an electron-hole pair located at the site m
$|{\mathsf{\Phi }}_m\rangle$	Basis state of Frenkel Hamiltonian
$|{\mathsf{\Psi }}_n\rangle$	Eigenstate of Frenkel Hamiltonian
$|{\varphi }_{h_j}^m\rangle$	State of the molecule m with core hole at atom j
$|{\varphi }_e^m\rangle$	State of the molecule m with one electron in LUMO
$|{\varphi }_h^m\rangle$	State of the molecule m with hole in HOMO
$|{\mathsf{\Phi }}_F\rangle$	Final state after absorption
$|{\mathsf{\Phi }}_{F_{m,j,m^{\prime }}}\rangle$	Final state with a core hole at the atom j of the molecule m and an electron in LUMO of the molecule $m^{\prime }$
$|{\mathsf{\Phi }}_{F_{m,j,m^{\prime },m^{″}}}\rangle$	Final state with a core hole at the atom j of the molecule m, an electron-hole pair at the site $m^{\prime }$ and electron in LUMO at the site $m^{″}$