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Coherence is a fundamental characteristic of quantum systems and central to understanding quantum behaviour. It is also important for a variety of applications in quantum information. However, physical systems suffer from decoherence due to their interaction with the environment. Although different approaches have been developed to deal with decoherence, there is no unified framework to manipulate the degradation of quantum entanglement.
Decoherence serves as a major obstacle to achieving higher efficiency in all quantum technologies. Thus, controlling and mitigating decoherence is currently an active research direction. In this work, we experimentally manipulate entanglement sudden death (ESD), a major manifestation of decoherence, in an all-photonic setup.