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Minimal energy cost of entanglement extraction
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Minimal energy cost of entanglement extraction
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We compute the minimal energy cost for extracting entanglement from the ground state of a bosonic or fermionic quadratic system. Specifically, we find the minimal energy increase $\Delta E_{\mathrm{min}}$ in the system resulting from replacing an entangled pair of modes, sharing entanglement entropy $\Delta S$, by a product state, and we show how to construct modes achieving this minimal energy cost. Thus, we obtain a protocol independent lower bound on the extraction of pure state entanglement from quadratic systems. Due to their generality, our results apply to a large range of physical systems, as we discuss with examples.
Forward citations
Cited by 1 Pith paper
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Energy Flux as an Entanglement Current in Moving-Mirror Radiation
In moving-mirror analog Hawking radiation, negative energy flux is correlated with entanglement growth between local detector modes and is interpreted as an information-return channel tied to partner-mode recovery.
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