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• W2894848133 abstract "Abstract In studies of the quantum Zeno and anti-Zeno effects, it is usual to consider rapid projective measurements with equal time intervals being performed on the system to check whether or not the system is in the initial state. These projective measurements are selective measurements in the sense that the measurement results are read out and only the case where all the measurement results correspond to the initial state is considered in the analysis of the effect of the measurements. In this paper, we extend such a treatment to consider the effect of repeated non-selective projective measurements – only the final measurement is required to correspond to the initial state, while we do not know the results of the intermediate measurements. We present a general formalism to derive the effective decay rate of the initial quantum state with such nonselective measurements. Importantly, we show that there is a difference between using non-selective projective measurements and the usual approach of considering only selective measurements only if we go beyond the weak system-environment coupling regime in models other than the usual population decay models. As such, we then apply our formalism to investigate the quantum Zeno and anti-Zeno effects for three exactly solvable system-environment models: a single two-level system undergoing dephasing, a single two-level system interacting with an environment of two-level systems and a large spin undergoing dephasing. Our results show that the quantum Zeno and anti-Zeno effects in the presence of non-selective projective measurements can differ very significantly as compared to the repeated selective measurement scenario." @default.
• W2894848133 created "2018-10-12" @default.
• W2894848133 creator A5036759909 @default.
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• W2894848133 date "2018-10-05" @default.
• W2894848133 modified "2023-10-12" @default.
• W2894848133 title "The quantum Zeno and anti-Zeno effects with non-selective projective measurements" @default.
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• W2894848133 doi "https://doi.org/10.1038/s41598-018-33181-9" @default.
• W2894848133 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6173781" @default.
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• W2894848133 hasPublicationYear "2018" @default.
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