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cond-mat.dis-nn2026
Finite-size geometric crossover toward fragmentation of the potential energy shell in the quantum random energy model
Ishita Modak, Vatsana Tiwari, Soumya Bera
The quantum random energy model (QREM) is a paradigmatic model for studying delocalization-localization transitions at finite energy density in Fock space. In the computational bas…
cond-mat.str-el2026
Fractonic Constraints and Magnetic Order in a Dipole-Conserving Spin Chain
Prabhakar, Giuseppe De Tomasi, Soumya Bera
This work investigates the competition between dipole conservation, which imposes strong dynamical constraints and prevents the propagation of isolated spin excitations, and Ising-…