Entanglement protection in higher-dimensional systems

Abstract The inevitable dissipative interaction of an entangled quantum system with its environment causes degradation in correlations present the system. This can lead to a finite-time disappearance entanglement, which is known as Entanglement Sudden Death (ESD). Here, we consider initially qubit-qutrit and noise leads ESD, propose set local unitary operations, when applied on qubit, qutrit, or both subsystems during decoherence process, cause ESD be hastened, delayed, avoided altogether, depending time application. Delay avoidance may find practical application information processing protocols that would otherwise suffer due short lifetime entanglement. physical implementation these unitaries discussed context atomic simulation results such manipulations are presented for two different classes systems. A prescription generalization this scheme qutrit-qutrit given. technique entanglement protection noisy compared other related techniques weak measurement reversal, dynamic decoupling, Zeno effect.