  We investigate the entanglement generation or harvesting between two
identical Unruh-DeWitt detectors in the cosmological de Sitter spacetime. We
consider two comoving two-level detectors at a coincident spatial position. The
detectors are assumed to be unentangled initially. The detectors are
individually coupled to a scalar field, which eventually leads to coupling
between the two detectors. We consider two kinds of scalar fields --
conformally symmetric and massless minimally coupled, for both real and complex
cases. By tracing out the degrees of freedom corresponding to the scalar field,
we construct the reduced density matrix for the two detectors, whose
eigenvalues characterise transitions between the energy levels of the
detectors. By using the existing results for the detector response functions
per unit proper time for these fields, we next compute the logarithmic
negativity, quantifying the degree of entanglement generated at late times
between the two detectors. The similarities and differences of these results
for different kind of scalar fields have been discussed.
