fulqrum.ramps.ramps_restricted_simple

ramps_restricted_simple(QubitOperator H, Subspace target_subspace, double target_energy, Subspace restricted_subspace, unsigned int max_recursion=3, double tol=1e-14)

RAMPS restricted to an existing subspace when targeting a single bit-string and associated energy.

Parameters:

  • H (QubitOperator) – Hamiltonian

  • target_subspace (Subspace) – Target subspace to expand around

  • target_energy (double) – Target energy from target subspace

  • restricted_subspace (Subspace) – Subspace to restrict search in

  • max_recursion (int) – Optional, maximum number of recursions to perform, default=3

  • tol (double) – Optional, tolerance value for truncation, default=1e-14

Returns:

RAMPS refined subspace

Return type:

Subspace