Entanglement that is represented by the conservation law is instantaneous and permanent. Entanglement is not uniquely quantum mechanical, although it looks conspicuous in quantum mechanics. Newtonian mechanics are in the lines of entanglement. Einstein–Podolsky–Rosen (EPR)-type sequential experiments can be performed using an entangled photon beam and two pairs of linear polarization analyzers setting at cross-Nicol condition (i.e., setting at orthogonal to each other). In this experiment, we predict that the “continuity of quantum entanglement” under a pure Hamiltonian evolution is detected.