Protecting quantum correlations in presence of generalised amplitude damping channel: the two-qubit case

Abstract

Any kind of quantum resource useful in different information processing tasks is vulnerable to several types of environmental noise. Here we study the behaviour of quantum correlations such as entanglement and steering in two-qubit systems under the application of the generalised amplitude damping channel and propose some protocols towards preserving them under this type of noise. First, we employ the technique of weak measurement and reversal for the purpose of preservation of correlations. We then show how the evolution under the channel action can be seen as an unitary process. We use the technique of weak measurement and most general form of selective positive operator valued measure (POVM) to achieve preservation of correlations for a significantly large range of parameter values.

arXiv comment11 pages, 6 figures. Comments welcome!

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Cited by in corpus (5)

• Device-Independent Quantum Secure Direct Communication Under Non-Markovian Quantum Channels
• Preservation of entanglement in local noisy channels
• Protecting an unknown qubit state by weak measurement
• Role of Steering Inequality In Quantum Key Distribution Protocol
• Incompatibility of optimized protection of entanglement and teleportation fdelity in the presence of decoherence