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H. Dhar

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Preprint Aug 2026

Surpassing Gaussian optimality in multiparameter estimation with indefinite causal order

We identify single-mode Gaussian probes, generated by displacement and squeezing operations on the vacuum state, which are optimal for the simultaneous estimation of displacement and squeezing operations in continuous-variable quantum systems. Importantly, our results reveal that the best precision at a fixed energy is...

Sudipta Das, Rivu Gupta, A. De et al. · 0 citations

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