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  • Letter
  • Open Access

Directing entanglement spreading by means of a quantum East/West heterojunction structure

Guanhua Chen

Yao Yao*

  • *Contact author: yaoyao2016@scut.edu.cn
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Phys. Rev. Research 6, L032014 – Published 16 July, 2024

DOI: https://doi.org/10.1103/PhysRevResearch.6.L032014

Abstract

We extend the translationally invariant quantum East model to an inhomogeneous chain with East/West heterojunction structure. In analogy to the quantum diffusion of particles, we observe a plateaus-shaped entanglement entropy spreading in the heterojunction during time evolution that can be regarded as continuous cycles in a quantum heat engine. In order to figure out the possibility of manipulating the entanglement entropy as a quantum resource, the entropy growth is shown to be determined by the initial occupation and the site-dependent chemical potential, and the former is equivalent to an effective temperature. Through fine adjustment of these parameters, we discover the entanglement flow is simply superposed with those from two sources of the chain. An intriguing relation between our model and the traditional heat engines is subsequently established.

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Phys. Rev. Research 6, L032014– Published 16 July, 2024
  • Received 21 November 2023
  • Revised 15 June 2024
  • Accepted 20 June 2024
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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