We study both pentapartite GHZ and W-class states in the noninertial frame and explore their entanglement properties by carrying out the negativities including 1-4, 2-3, and 1-1 tangles, the whole entanglement measures ...

We consider a qubit-qutrit system interacting each other through an isotropic Heisenberg Hamiltonian in a uniform magnetic field. An expression for the entanglement between the two parties as a function of both the anisotropy ...