fulqrum.ramps.ramps_open

ramps_open(Hsub, Subspace target_subspace, double target_energy, unsigned int max_recursion=1, double tol=1e-12)

Unrestricted RAMPS around the input target subspace.

The resultant subspace will be the target subspace with addtional bit-strings added that perturbatively affect the energy more than the tolerance value

Parameters:

  • Hsub (SubspaceHamiltonian) – Hamiltonian

  • target_subspace (Subspace) – Target subspace to expand around

  • target_energy (double) – Target energy from target subspace

  • max_recursion (int) – Optional, maximum number of recursions to perform, default=1

  • tol (double) – Optional, tolerance value for truncation, default=1e-12

Returns:

RAMPS constructed subspace

Return type:

Subspace