Estimation for entanglement negativity of free fermions

DOI10.1088/1742-5468/2016/07/073102zbMATH Open1456.81071arXiv1601.00678OpenAlexW2226062175MaRDI QIDQ3302750

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Publication date: 11 August 2020

Published in: (Search for Journal in Brave)

Abstract: In this letter we study the negativity of one dimensional free fermions. We derive the general form of the $mathbb{Z}_N$ symmetric term in moments of the partial transposed (reduced) density matrix, which is an algebraic function of the end points of the system. Such a path integral turns out to be a convenient tool for making estimations for the negativity.

Full work available at URL: https://arxiv.org/abs/1601.00678

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