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- W2945002007 abstract "For the typical quantum many-body systems that obey the eigenstate thermalization hypothesis (ETH), we argue that the entanglement entropy of (almost) all energy eigenstates is described by a single crossover function. The ETH implies that the crossover functions can be deduced from subsystem entropies of thermal ensembles and have universal properties. These functions capture the full crossover from the groundstate entanglement regime at low energies and small subsystem size (area or log-area law) to the extensive volume-law regime at high energies or large subsystem size. For critical one-dimensional systems, a universal scaling function follows from conformal field theory (CFT) and can be adapted for nonlinear dispersions. We use it to also deduce the crossover scaling function for Fermi liquids in $d>1$ dimensions. The analytical results are complemented by numerics for large non-interacting systems of fermions in $d=1$, $2$, and $3$ dimensions and have also been confirmed for bosonic systems and non-integrable spin chains. Furthermore, one can deduce the distribution function for eigenstate entanglement." @default.
- W2945002007 created "2019-05-29" @default.
- W2945002007 creator A5019126088 @default.
- W2945002007 creator A5052095300 @default.
- W2945002007 date "2021-07-21" @default.
- W2945002007 modified "2023-10-14" @default.
- W2945002007 title "Eigenstate Entanglement: Crossover from the Ground State to Volume Laws" @default.
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- W2945002007 doi "https://doi.org/10.1103/physrevlett.127.040603" @default.
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- W2945002007 hasPublicationYear "2021" @default.
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