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Modules
bch_expansion module: Module to efficiently compute the Baker-Campbell-Hausdorff formula.
channel_state module: Module to manipulate basic models of quantum channels
commutators module: Module to compute commutators, with optimizations for specific systems.
grid module
indexing module: Defines index mappings.
lattice module
operator_utils module: This module provides generic tools for classes in ops/
rdm_mapping_functions module: Mapping RDMs to other RDMs
Classes
class Grid: A multi-dimension grid of points with an assigned length scale.
class HubbardLattice: Base class for a Hubbard model lattice.
class HubbardSquareLattice: A square lattice for a Hubbard model.
class OperatorSpecificationError: Common base class for all non-exit exceptions.
class OperatorUtilsError: Common base class for all non-exit exceptions.
class Spin: Enum where members are also (and must be) ints
class SpinPairs: The spin orbitals corresponding to a pair of spatial orbitals.
Functions
amplitude_damping_channel(...): Apply an amplitude damping channel
anticommutator(...): Compute the anticommutator of two operators.
bch_expand(...): Compute \(\log[e^{x_1} ... e^{x_N}]\) using the BCH formula.
commutator(...): Compute the commutator of two operators.
count_qubits(...): Compute the minimum number of qubits on which operator acts.
dephasing_channel(...): Apply a dephasing channel
depolarizing_channel(...): Apply a depolarizing channel
double_commutator(...): Return the double commutator [op1, [op2, op3]].
down_index(...): Function to return down-orbital index given a spatial orbital index.
get_file_path(...): Compute file_path for the file that stores operator.
hermitian_conjugated(...): Return Hermitian conjugate of operator.
is_hermitian(...): Test if operator is Hermitian.
is_identity(...): Check whether QubitOperator of FermionOperator is identity.
load_operator(...): Load FermionOperator or QubitOperator from file.
map_one_hole_dm_to_one_pdm(...): Convert a 1-hole-RDM to a 1-RDM
map_one_pdm_to_one_hole_dm(...): Convert a 1-RDM to a 1-hole-RDM
map_particle_hole_dm_to_one_pdm(...): Map the particle-hole-RDM to the 1-RDM
map_particle_hole_dm_to_two_pdm(...): Map the 2-RDM to the particle-hole-RDM
map_two_hole_dm_to_one_hole_dm(...): Map from 2-hole-RDM to 1-hole-RDM
map_two_hole_dm_to_two_pdm(...): Map from the 2-hole-RDM to the 2-RDM
map_two_pdm_to_one_pdm(...): Contract a 2-RDM to a 1-RDM
map_two_pdm_to_particle_hole_dm(...): Map the 2-RDM to the particle-hole-RDM
map_two_pdm_to_two_hole_dm(...): Map from the 2-RDM to the 2-hole-RDM
save_operator(...): Save FermionOperator or QubitOperator to file.
trivially_commutes_dual_basis(...): Determine whether the given terms trivially commute.
trivially_double_commutes_dual_basis(...): Check if the double commutator [term_a, [term_b, term_c]] is zero.
trivially_double_commutes_dual_basis_using_term_info(...): Return whether [op_a, [op_b, op_a_prime]] is trivially zero.
up_index(...): Function to return up-orbital index given a spatial orbital index.
up_then_down(...): up then down reordering, given the operator has the default even-odd ordering.