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Quantum entanglement and decoherence are the two counterforces of many quantum technologies and protocols. For example, while quantum teleportation is fueled by a pair of maximally entangled resource qubits, it is vulnerable to decoherence. Here, we propose an efficient quantum teleportation protocol in the presence of pure decoherence and without entangled resource qubits entering the Bell-state measurement. Instead, we use multipartite hybrid entanglement between the auxiliary qubits and their local environments within the open-quantum system context. With a hybrid-entangled initial state, it is the decoherence that allows us to achieve high fidelities. We demonstrate our protocol in an all-optical experiment. [ABSTRACT FROM AUTHOR]

The article presents a research study where researchers construct an non-Hermiticity (NH) system in a new configuration along the synthetic orbital angular momentum (OAM) dimension in a degenerate cavity. researchers have developed a unique method to explore the band structure along the synthetic OAM dimension. It is evident that EPs along the OAM lattice have unique optical applications.

The article presents research report on zero–trade-off multiparameter quantum estimation via simultaneously saturating multiple Heisenberg uncertainty relations. Topics include highest precisions for multiple parameters at the same time requires the saturation of multiple Heisenberg uncertainty relations; and ultimate precisions for multiple parameters, our work marks an important step in multiparameter quantum metrology with wide implications.

The article presents a study on the reduction of quantum measurement back action in work distributions through collective calculation. It outlines the estimation of work fluctuation based on estimations on the coherence in energy in quantum thermodynamics. An overview of its experimental application in optical systems is also provided.

The article offers information on a study regarding beating the channel capacity limit for superdense coding (SDC) with entangled ququarts. It mentions that the SDC with high-dimensional entanglement is promising in the future. It states that the photon pairs are generated from ppKTP, the overall detection efficiency can be as high when using careful alignment and superconductor detectors.