Abstract
We propose a large class of bipartite entangled nonorthogonal states in the context of power-law potential systems including harmonic, infinite square-well, and triangular-well potentials. Using the concurrence as a measure of entanglement, we give the condition for maximal and separable states. We show that a large class of maximal states can be obtained in terms of the different potentials. Moreover, we find that the entanglement in these real systems can be used as a good approximation to describe correlations similar to the case of Glauber states, and they coincide as the exponent parameter tends to 2. These features make the bipartite entangled nonorthogonal states with the power-law potential systems a good candidate for implementation of different schemes of quantum optics and information.