3 papers
quant-ph2026
Spectral Gap of the Davies Generator for the Mean-Field Heisenberg Model
Joao Basso, Thiago Bergamaschi, Lin Lin +2
The mean-field Heisenberg ferromagnet is a quantum spin model on the complete graph with isotropic spin-1/2 interactions. This non-commuting Hamiltonian is permutation and $\mathsf…
cond-mat.str-el2026
Ab initio quantum embedding description of magic angle twisted bilayer graphene at even-integer fillings
Raehyun Kim, Woochang Kim, Kevin D. Stubbs +2
Magic angle twisted bilayer graphene (MATBG) hosts narrow moiré bands with meV-scale energy splittings, making its correlated phases sensitive to both material parameters and mode…
math-ph2025
The Many-Body Ground State Manifold of Flat Band Interacting Hamiltonian for Magic Angle Twisted Bilayer Graphene
Kevin D. Stubbs, Michael Ragone, Allan H. MacDonald +1
At a magic relative twist angle, magic angle twisted bilayer graphene (MATBG) has an octet of flat bands that can host strong correlation physics when partially filled. A key theor…