A. Condensed matter

Condensed matter physics studies the collective behavior of matter, from crystalline structure and lattice models to interacting phases, topology, and material response.

A.1. Scope

Crystal covers crystal structures, reciprocal-space descriptions, symmetries, and dynamics.

LatticeModels covers Hamiltonian models whose degrees of freedom live on lattices.

BandTheory covers Bloch descriptions, energy bands, gaps, and band geometry.

ManyBody covers correlations, quasiparticles, Green functions, and interacting matter.

Topology covers topological phases and invariants in condensed matter systems.

Response covers transport and the linear, optical, and nonlinear response of materials.

A.2. Existing modules

Existing condensed-matter modules currently include TightBindingChain and Thermoelectric. They remain in their existing locations and have not been reorganized into the scopes above.