  We study the entanglement between two identical two-level atoms located near
an ideal model of invisibility cloaks, by monitoring the the time evolution of
the concurrence measure. We obtain the reduced density operator of the atomic
subsystem based on a canonical quantization scheme presented for the
electromagnetic field interacting with atomic systems in the presence of an
anisotropic, inhomogeneous and absorbing magnetodielectric medium. It is shown
that two atoms, which are prepared initially in an unentangled state, are
correlated in weak coupling regime via the spontaneous emission and the
dipole-dipole interaction of two atoms mediated by the invisibility cloak. We
therefore find that the invisibility cloak, independent of the hidden object,
works fairly well at frequencies far from the resonance frequency of the object
and the cloak, whereas near the resonance frequency, the hidden object becoming
detectable due to a sharp reduction of the concurrence.
