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Modules
binary_codes module: Pre-existing codes for Fermion-qubit mappings
bksf module: bravyi_kitaev_fast transform on fermionic operators.
commutator_diagonal_coulomb_operator module: Faster commutators for two-body operators with diagonal Coulomb terms.
conversions module
fenwick_tree module: Class to represent a Fenwick tree.
qubitoperator_to_paulisum module
remove_symmetry_qubits module: Module to remove two qubits from the problem space using conservation of electron number and conservation of electron spin.
term_reordering module: Functions to reorder terms within SymbolicOperators
verstraete_cirac module: Verstraete-Cirac transform on fermionic operators.
Classes
class FenwickNode: Fenwick Tree node.
class FenwickTree: Recursive implementation of the Fenwick tree.
Functions
binary_code_transform(...): Transforms a Hamiltonian written in fermionic basis into a Hamiltonian written in qubit basis, via a binary code.
bravyi_kitaev(...): Apply the Bravyi-Kitaev transform.
bravyi_kitaev_code(...): The Bravyi-Kitaev transform as binary code.
bravyi_kitaev_fast(...): Find the Pauli-representation of InteractionOperator for Bravyi-Kitaev Super fast (BKSF) algorithm.
bravyi_kitaev_fast_edge_matrix(...): Use InteractionOperator to construct edge matrix required for the algorithm
bravyi_kitaev_fast_interaction_op(...): Transform from InteractionOperator to QubitOperator for Bravyi-Kitaev fast algorithm.
bravyi_kitaev_tree(...): Apply the "tree" Bravyi-Kitaev transform.
check_no_sympy(...): Checks whether a SymbolicOperator contains any sympy expressions, which will prevent it being converted to a PolynomialTensor or DiagonalCoulombHamiltonian
checksum_code(...): Checksum code for either even or odd Hamming weight.
chemist_ordered(...): Puts a two-body fermion operator in chemist ordering.
commutator_ordered_diagonal_coulomb_with_two_body_operator(...): Compute the commutator of two-body operators provided that both are normal-ordered and that the first only has diagonal Coulomb interactions.
dissolve(...): Decomposition helper.
edge_operator_aij(...): Calculate the edge operator A_ij.
edge_operator_b(...): Calculate the edge operator B_i.
edit_hamiltonian_for_spin(...): Removes the Z terms acting on the orbital from the Hamiltonian.
extractor(...): Applies the extraction superoperator to a binary expression to obtain the corresponding qubit operators.
generate_fermions(...): The QubitOperator for generating fermions in bravyi_kitaev_fast representation
get_boson_operator(...): Convert to BosonOperator.
get_fermion_operator(...): Convert to FermionOperator.
get_majorana_operator(...): Convert to MajoranaOperator.
get_quad_operator(...): Convert to QuadOperator.
inline_product(...): Computes a product, using the imul operator.
inline_sum(...): Computes a sum, using the iadd operator.
interleaved_code(...): Linear code that reorders orbitals from even-odd to up-then-down.
jordan_wigner(...): Apply the Jordan-Wigner transform to a FermionOperator, InteractionOperator, or DiagonalCoulombHamiltonian to convert to a QubitOperator.
jordan_wigner_code(...): The Jordan-Wigner transform as binary code.
jordan_wigner_one_body(...): Map the term a^\dagger_p a_q + h.c. to QubitOperator.
jordan_wigner_two_body(...): Map the term a^\dagger_p a^\dagger_q a_r a_s + h.c. to QubitOperator.
linearize_decoder(...): Outputs linear decoding function from input matrix
make_parity_list(...): Create the parity list from the decoder of the input code.
normal_ordered(...): Compute and return the normal ordered form of a FermionOperator, BosonOperator, QuadOperator, or InteractionOperator.
normal_ordered_ladder_term(...): Return a normal ordered FermionOperator or BosonOperator corresponding to single term.
normal_ordered_quad_term(...): Return a normal ordered QuadOperator corresponding to single term.
number_operator(...): Find the qubit operator for the number operator in bravyi_kitaev_fast representation
parity_code(...): The parity transform (arXiv:1208.5986) as binary code.
qubit_operator_to_pauli_sum(...): Convert QubitOperator to a sum of PauliString.
reorder(...): Changes the ladder operator order of the Hamiltonian based on the provided order_function per mode index.
reverse_jordan_wigner(...): Transforms a QubitOperator into a FermionOperator using the Jordan-Wigner transform.
symmetry_conserving_bravyi_kitaev(...): Returns the qubit Hamiltonian for the fermionic Hamiltonian supplied, with two qubits removed using conservation of electron spin and number, as described in arXiv:1701.08213.
vacuum_operator(...): Use the stabilizers to find the vacuum state in bravyi_kitaev_fast.
verstraete_cirac_2d_square(...): Apply the Verstraete-Cirac transform on a 2-d square lattice.
vertical_edges_snake(...): Obtain the vertical edges in the 2-d snake ordering.
weight_one_binary_addressing_code(...): Weight-1 binary addressing code (arXiv:1712.07067).
weight_one_segment_code(...): Weight-1 segment code (arXiv:1712.07067).
weight_two_segment_code(...): Weight-2 segment code (arXiv:1712.07067).