Class freeModel#
Defined in File freeModel.hpp
Inheritance Relationships#
Base Type#
public fermionBasis(Class fermionBasis)
Class Documentation#
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class freeModel : public fermionBasis#
Free-fermion reference model used for static thermodynamic benchmarks.
This model builds a non-interacting fermionic basis with charge and spin quantum numbers and diagonalizes the local Hamiltonian in each symmetry sector. It is useful as a reference when comparing with interacting models or computing entropy and specific-heat contributions in a noninteracting limit.
Public Functions
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inline freeModel()#
Construct the free-fermion benchmark model.
Builds the fermion basis, identifies the conserved quantum numbers, and computes the diagonalized eigenvalues for each block.
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inline std::vector<std::vector<int>> get_basis() const#
Return the list of quantum numbers for each symmetry sector.
- Returns:
Vector of charge/spin sector labels.
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inline std::vector<std::vector<double>> get_eigenvaluesQ() const#
Return the eigenvalues of the Hamiltonian in each sector.
- Returns:
Block-diagonal eigenvalues associated with each quantum-number sector.
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inline std::vector<double> get_chi_Q() const#
Return the fermionic parity factor for each sector.
- Returns:
Vector of parity signs used in the fermionic sector structure.
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inline freeModel()#