Modeling

This section contains the core building blocks used to assemble quantum many-body (QMB) Hamiltonians (local, two-body, and plaquette interactions) and to analyze QMB states (expectation values, reduced density matrices, entanglement entropy, and basis-state configurations). It also includes base classes and lattice masks used by the term builders. Lower-level subsystem / environment helpers are documented separately in the dedicated Entanglement section.

Contents:

• QMBTerm Base
  • QMBTerm
• LocalTerm Class
  • LocalTerm
• TwoBodyTerm Class
  • TwoBodyTerm
• PlaquetteTerm Class
  • PlaquetteTerm
• NBodyTerm Class
  • NBodyTerm
• Quantum Many Body (QMB) Operations
  • qmb_operator()
  • local_op()
  • two_body_op()
  • four_body_op()
  • construct_operator_list()
  • apply_basis_projection()
• QMB Hamiltonian Class
  • QMB_hamiltonian
  • get_entropy_partition()
• Tools for a Quantum Many Body (QMB) State
  • QMB_state
  • truncation()
  • get_norm()
  • mixed_exp_val_data()
• Masks
  • Examples