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

Quantum Physics [Submitted on 7 Apr 2026] Optimization of entanglement harvesting with arbitrary temporal profiles: the limit of second order perturbation theory Marcos Morote-Balboa, T. Rick Perche 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. Comments: 12 pages, 8 figures + appendices Subjects: Quantum Physics (quant-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th) Cite as: arXiv:2604.06303 [quant-ph]   (or arXiv:2604.06303v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.06303 Focus to learn more Submission history From: Tales Rick Perche [view email] [v1] Tue, 7 Apr 2026 18:00:00 UTC (616 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-04 Change to browse by: gr-qc hep-th References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)