Dynamics of entangled pair of spin-1/2 particles under independent random magnetic fields

The dynamics of a pair of spatially separated spin-1/2 particles which are initially entangled and subjected to independent random magnetic fields is obtained by considering a pure joint state of entangled spin-1/2 particles and using stochastic calculus. The disentanglement time defined as the time taken for the particles to become disentangled, is obtained from the dynamics. In view of entanglement-based quantum communication, this analysis could help to assess the feasibility to send and receive quantum information within the disentanglement time.