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- W3103841844 abstract "We study the efficiency of quantum tomographic reconstruction where the system under investigation (quantum target) is indirectly monitored by looking at the state of a quantum probe that has been scattered off the target. In particular we focus on the state tomography of a qubit through a one-dimensional scattering of a probe qubit, with a Heisenberg-type interaction. Via direct evaluation of the associated quantum Cram'{e}r-Rao bounds, we compare the accuracy efficiency that one can get by adopting entanglement-assisted strategies with that achievable when entanglement resources are not available. Even though sub-shot noise accuracy levels are not attainable, we show that quantum correlations play a significant role in the estimation. A comparison with the accuracy levels obtainable by direct estimation (not through a probe) of the quantum target is also performed." @default.
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- W3103841844 date "2012-02-24" @default.
- W3103841844 modified "2023-09-26" @default.
- W3103841844 title "Entanglement-assisted tomography of a quantum target" @default.
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- W3103841844 doi "https://doi.org/10.1088/1751-8113/45/10/105309" @default.
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