Condensed Matter Theory

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Long-time divergences in the nonlinear response of gapped one-dimensional many-particle systems

(2025)

Authors:

Michele Fava, Sarang Gopalakrishnan, Romain Vasseur, Siddharth A Parameswaran, Fabian HL Essler

Abstract:

SciPost Submission Detail Long-time divergences in the nonlinear response of gapped one-dimensional many-particle systems
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Feature learning is decoupled from generalization in high capacity neural networks

(2025)

Authors:

Niclas Alexander Göring, Charles London, Abdurrahman Hadi Erturk, Chris Mingard, Yoonsoo Nam, Ard A Louis
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Linear response and exact hydrodynamic projections in Lindblad equations with decoupled Bogoliubov hierarchies

(2025)

Authors:

Patrik Penc, Fabian HL Essler
Details from ArXiV

Expansion creates spin-glass order in finite-connectivity models: a rigorous and intuitive approach from the theory of LDPC codes

ArXiv 2507.13342 (2025)

Authors:

Benedikt Placke, Grace M Sommers, Nikolas P Breuckmann, Tibor Rakovszky, Vedika Khemani
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Chern-textured exciton insulators with valley spiral order in moiré materials

Physical Review B American Physical Society (APS) 112:3 (2025) 35130

Authors:

Ziwei Wang, Yves H Kwan, Glenn Wagner, Steven H Simon, Nick Bultinck, Sa Parameswaran

Abstract:

We explore the phase diagrams of moiré materials in search of a class of intervalley-coherent correlated insulating state: the Chern texture insulator (CTI). This phase of matter, proposed in a companion paper [Kwan , .], breaks valley <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mi>U</mi> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </math> symmetry in a nontrivial fashion wherein the valley order parameter is forced to texture in momentum space as a consequence of band topology. Using detailed Hartree-Fock studies, we establish that the CTI emerges as an energetically competitive intermediate-coupling ground state in several moiré systems that lack a twofold rotation symmetry that forbids the single-particle topology essential to the formation of the CTI valley texture. Published by the American Physical Society 2025
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