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1. Entanglement entropy from entanglement contour: higher dimensions

   https://doi.org/10.21468/SciPostPhysCore.5.2.020  

   Han, Muxin; Wen, Qiang (January 2022, SciPost Physics Core)

   We study the entanglement contour and partial entanglement entropy (PEE) in quantum field theories in 3 and higher dimensions. The entanglement entropy is evaluated from a certain limit of the PEE with a geometric regulator. In the context of the entanglement contour, we classify the geometric regulators, study their difference from the UV regulators. Furthermore, for spherical regions in conformal field theories (CFTs) we find the exact relation between the UV and geometric cutoff, which clarifies some subtle points in the previous literature. We clarify a subtle point of the additive linear combination (ALC) proposal for PEE in higher dimensions. The subset entanglement entropies in the ALC proposal should all be evaluated as a limit of the PEE while excluding a fixed class of local-short-distance correlation. Unlike the 2-dimensional configurations, naively plugging the entanglement entropy calculated with a UV cutoff will spoil the validity of the ALC proposal. We derive the entanglement contour function for spherical regions, annuli and spherical shells in the vacuum state of general-dimensional CFTs on a hyperplane. 

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2. Entanglement in De Sitter space

   https://doi.org/10.1007/JHEP08(2022)198  

   Shaghoulian, Edgar; Susskind, Leonard (August 2022, Journal of High Energy Physics)

   A bstract This paper expands on two recent proposals, [12, 13] and [14], for generalizing the Ryu-Takayanagi and Hubeny-Rangamani-Takayanagi formulas to de Sitter space. The proposals (called the monolayer and bilayer proposals) are similar; both replace the boundary of AdS by the boundaries of static-patches — in other words event horizons. After stating the rules for each, we apply them to a number of cases and show that they yield results expected on other grounds. The monolayer and bilayer proposals often give the same results, but in one particular situation they disagree. To definitively decide between them we need to understand more about the nature of the thermodynamic limit of holographic systems. 

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3. Qubit Recycling in Entanglement Distillation

   https://doi.org/10.1109/QCE57702.2023.00013  

   Pelletier, Stuart; Yu, Ruozhou; Rouskas, George; Liu, Jianqing (September 2023, IEEE)
4. Morphological Entanglement in Living Systems

   https://doi.org/10.1103/PhysRevX.14.011008  

   Day, Thomas C; Zamani-Dahaj, S Alireza; Bozdag, G Ozan; Burnetti, Anthony J; Bingham, Emma P; Conlin, Peter L; Ratcliff, William C; Yunker, Peter J (January 2024, Physical Review X)
5. Entanglement Ball: Using Dodgeball to Introduce Quantum Entanglement

   https://doi.org/10.1119/5.0019871  

   Marckwordt, Jasmine; Muller, Alexandria; Harlow, Danielle; Franklin, Diana; Landsberg, Randall H. (November 2021, The Physics Teacher)

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