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Entropy 2017, 19(9), 449; https://doi.org/10.3390/e19090449

Harvesting Large Scale Entanglement in de Sitter Space with Multiple Detectors

Department of Physics, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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Received: 4 August 2017 / Revised: 23 August 2017 / Accepted: 23 August 2017 / Published: 28 August 2017
(This article belongs to the Special Issue Entropy and Information in the Foundation of Quantum Physics)
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Abstract

We consider entanglement harvesting in de Sitter space using a model of multiple qubit detectors. We obtain the formula of the entanglement negativity for this system. Applying the obtained formula, we find that it is possible to access to the entanglement on the super horizon scale if a sufficiently large number of detectors are prepared. This result indicates the effect of the multipartite entanglement is crucial for detection of large scale entanglement in de Sitter space. View Full-Text
Keywords: detector; negativity; multipartite entanglement; monogamy; de Sitter space detector; negativity; multipartite entanglement; monogamy; de Sitter space
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Kukita, S.; Nambu, Y. Harvesting Large Scale Entanglement in de Sitter Space with Multiple Detectors. Entropy 2017, 19, 449.

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