2025/11/14 by Bruno Mera, Tomoki Ozawa, Mera, Bruno +2
Physics and Astronomy · #Berry connection and curvature #Chern class #Coupling (piping) #Dirac (video compression format) #Dissipative system #Ideal (ethics) #Markov process #Nonlinear Photonic Systems #Quantum #Quantum Mechanics and Non-Hermitian Physics #Quantum and electron transport phenomena #Relaxation (psychology) #Topological Materials and Phenomena
paper · pdf · open access · doi:10.1103/d766-sns5
published in Physical Review Letters 137(4) (American Physical Society)
openalex publication_date 2026/06/22 · openalex created_date 2026/06/23 · openalex updated_date 2026/07/22
We propose a microscopic, weak-coupling mechanism by which generic Chern bands asymptotically relax toward ideal bands. We consider coupling interacting electrons to a Caldeira-Leggett-like Ohmic bosonic bath. Using the Born-Markov approximation, we analytically show that, upon taking the leading order contribution in momentum of the form factor, Slater determinant states of a Chern band under Hartree-Fock approximation evolve toward Slater determinant states corresponding to an ideal Chern band. We also numerically validate our proposal by performing simulation of a massive Dirac model with the extended Hubbard interaction, showing that the Berry curvature and quantum metric co-evolve toward saturation of the trace condition. Our proposal provides a concrete dissipative mechanism for driving Chern bands toward ideal quantum geometry, a fundamental building block for the stabilization of fractional Chern insulators.