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Entanglement entropy of two-species hard-core bosons in one dimension

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Abstract

We study the bipartite entanglement entropy of a model for two-species hard-core bosons in one dimension. In this model, the same-species bosons satisfy hard-core conditions while the different-species bosons are allowed to occupy the same site with a local interaction strength U. We measure the bipartite entanglement entropy of the ground states of an infinite-size system as a function of U in the half-filled and the off-half-filled cases. To achieve this goal, we use a time-evolution-block-decimation method with large bond dimensions up to 300.

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Acknowledgements

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1D1A1B03035188). JWL thanks the Korea Institute for Advanced Study (KIAS) for its hospitality under the Associate Member program. JWL also thanks M.-C. Cha, M. H. Chung, T. Xiang, and Z. Yuan for their stimulating discussions.

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Authors and Affiliations

  1. Department of Physics, Myongji University, Yongin, 17052, Korea

    Tae Yong Kim, Hang Gon Cho & Ji-Woo Lee

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  1. Tae Yong Kim
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  2. Hang Gon Cho
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  3. Ji-Woo Lee
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Correspondence to Ji-Woo Lee.

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Kim, T.Y., Cho, H.G. & Lee, JW. Entanglement entropy of two-species hard-core bosons in one dimension. J. Korean Phys. Soc. 78, 688–692 (2021). https://doi.org/10.1007/s40042-021-00098-y

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  • DOI: https://doi.org/10.1007/s40042-021-00098-y

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