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This research advances the theoretical framework for entanglement harvesting by optimizing probe coupling to quantum vacuum fields using Hermite expansions. The study demonstrates that these optimized protocols significantly enhance negativity between probes, pushing experimental requirements beyond standard second-order perturbation theory limits. Such methodological improvements are critical for refining future quantum sensing and communication architectures involving field interactions.

Surse care acoperăarXiv, Quantum Zeitgeist

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Optimization of entanglement harvesting with arbitrary temporal profiles: the limit of second order perturbation theory

arXiv27 iulie 20261 min de cititArticolul și perspectiva sunt în engleză.

arXiv:2604.06303v3 Announce Type: replace Abstract: We study the protocol of entanglement harvesting when two local probes couple to the vacuum of a real scalar quantum field with arbitrary temporal profiles. We use a Hermite expansion to efficiently compute smeared field propagators in closed-form, recasting the negativity between the probes as a matrix product. We then optimize the protocol under different signalling conditions, enhancing entanglement harvesting by several orders of magnitude. This optimization would take current experimental proposals beyond the regime of second order perturbation theory.

Abstract:We study the protocol of entanglement harvesting when two local probes couple to the vacuum of a real scalar quantum field with arbitrary temporal profiles. We use a Hermite expansion to efficiently compute smeared field propagators in closed-form, recasting the negativity between the probes as a matrix product. We then optimize the protocol under different signalling conditions, enhancing entanglement harvesting by several orders of magnitude. This optimization would take current experimental proposals beyond the regime of second order perturbation theory.

arXiv:2604.06303 [quant-ph]

(or arXiv:2604.06303v3 [quant-ph] for this version)

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