  We combine the coupled-cluster method and the Lorentz integral transform for
the computation of inelastic reactions into the continuum. We show that the
bound-state-like equation characterizing the Lorentz integral transform method
can be reformulated based on extensions of the coupled-cluster
equation-of-motion method, and we discuss strategies for viable numerical
solutions. Starting from a chiral nucleon-nucleon interaction at
next-to-next-to-next-to-leading order, we compute the giant dipole resonances
of 4He, 16,22O and 40Ca, truncating the coupled-cluster equation-of-motion
method at the two-particle-two-hole excitation level. Within this scheme, we
find a low-lying E1 strength in the neutron-rich 22O nucleus, which compares
fairly well with data from [Leistenschneider et al. Phys. Rev. Lett. 86, 5442
(2001)]. We also compute the electric dipole polariziability in 40Ca.
Deficiencies of the employed Hamiltonian lead to overbinding, too small charge
radii and a too small electric dipole polarizability in 40Ca.
