Entanglement dynamics of high-dimensional bipartite field states inside the cavities in dissipative environments
Rabia Tahira, Manzoor Ikram, Smail B. Bougouffa, Muhammad Suhail Zubairy · Journal of Physics B Atomic Molecular and Optical Physics · 2010
We investigate the phenomenon of sudden death of entanglement in a high-dimensional bipartite system subjected to dissipative environments with an arbitrary initial pure entangled state between two fields in the cavities. We find that in a vacuum reservoir, the presence of the state where one or more than one (two) photons in each cavity are present is a necessary condition for the sudden death of entanglement. Otherwise entanglement remains for infinite time and decays asymptotically with the decay of individual qubits. For pure two-qubit entangled states in a thermal environment, we observe that sudden death of entanglement always occurs. The sudden death time of the entangled states is related to the number of photons in the cavities, the temperature of the reservoir and the initial preparation of the entangled states.