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  Entanglement of midspectrum eigenstates of chaotic many-body systems: Reasons for deviation from random ensembles

Haque, M., McClarty, P. A., & Khaymovich, I. M. (2022). Entanglement of midspectrum eigenstates of chaotic many-body systems: Reasons for deviation from random ensembles. Physical Review E, 105(1): 014109. doi:10.1103/PhysRevE.105.014109.

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Haque, Masudul1, Author           
McClarty, Paul A.1, Author           
Khaymovich, Ivan M.1, Author           
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1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 Abstract: Eigenstates of local many-body interacting systems that are far from spectral edges are thought to be ergodic and close to being random states. This is consistent with the eigenstate thermalization hypothesis and volume-law scaling of entanglement. We point out that systematic departures from complete randomness are generically present in midspectrum eigenstates, and focus on the departure of the entanglement entropy from the randomstate prediction. We show that the departure is (partly) due to spatial correlations and due to orthogonality to the eigenstates at the spectral edge, which imposes structure on the midspectrum eigenstates.

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 Dates: 2022-01-072022-01-01
 Publication Status: Issued
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Title: Physical Review E
  Other : Phys. Rev. E
Source Genre: Journal
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Publ. Info: Melville, NY : American Physical Society
Pages: - Volume / Issue: 105 (1) Sequence Number: 014109 Start / End Page: - Identifier: ISSN: 1539-3755
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012