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- W3209480925 abstract "Using the quantum map formalism, we provide a framework to construct fuzzy and coarse grained quantum states of many-body systems that account for limitations in the resolution of real measurement devices probing them. The first set of maps handles particle-indexing errors, while the second deals with the effects of detectors that can only resolve a fraction of the system constituents. We apply these maps to a spin-$1/2$ XX-chain obtaining a blurred picture of the entanglement generation and propagation in the system. By construction, both maps are simply related via a partial trace, which allow us to concentrate on the properties of the former. We fully characterize the fuzzy map, identifying its symmetries and invariants spaces. We show that the volume of the tomographically accessible states decreases at a double exponential rate in the number of particles, imposing severe bounds to the ability to read and use information of a many-body quantum system." @default.
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- W3209480925 date "2021-10-22" @default.
- W3209480925 modified "2023-10-03" @default.
- W3209480925 title "Fuzzy measurements and coarse graining in quantum many-body systems" @default.
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- W3209480925 doi "https://doi.org/10.1103/physreva.104.042218" @default.
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