4.6 Article

Decoherence-induced strongly sub-Poissonian nonlocality

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PHYSICAL REVIEW A
卷 108, 期 4, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.108.043701

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Quantum decoherence is the main obstacle to realizing quantum information processing, as it brings about the emergence of classical phenomena from the quantum world. However, we propose that decoherence can enable the creation of a bright source of strongly sub-Poissonian nonlocality. The adjustable and manipulable decoherence is achieved through the dressed-atom approach and combination mode technique. The strong sub-Poissonianity and robust Bell violation originate from the large squeezing parameter of the reservoir within the framework of reservoir theory.
Quantum decoherence tends to bring about the emergence of the classical from the quantum world through the interaction of a quantum system with the environment, which is the main impediment to the realization of quantum information processing. Counterintuitively, we propose that the decoherence enables the creation of a bright source of strongly sub-Poissonian nonlocality. The absence of the decoherence makes such a source impossible. Decoherence is devised to be adjustable and manipulable on the basis of the dressed-atom approach and combination mode technique. The strong sub-Poissonianity and robust Bell violation are originated from the large squeezing parameter of the reservoir pertaining to the controllable decoherence within the framework of the reservoir theory.

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