mindquantum.core.operators

Contents

mindquantum.core.operators#

MindQuantum operators library. An operator is composed of a combination of one or more basic gates.

Contains classes representing:

Qubit operators
Fermion operators
TimeEvolution operator

Class#

API Name	Description
`FermionOperator([...])`	Definition of a Fermion Operator.
`Hamiltonian(...)`	A QubitOperator hamiltonian wrapper.
`InteractionOperator(...)`	Class to store ‘interaction opeartors’ which are used to configure a ferinonic molecular Hamiltonian.
`PolynomialTensor([...])`	Class to store the coefficient of the fermionic ladder operators in a tensor form.
`Projector(proj)`	Projector operator.
`QubitExcitationOperator([...])`	QubitExcitationOperator class.
`QubitOperator([...])`	A sum of terms acting on qubits, e.g., 0.5 * ‘X1 X5’ + 0.3 * ‘Z1 Z2’.
`TimeEvolution(ops)`	The time evolution operator that can generate a corresponded circuit.

Function#

API Name	Description
`commutator(...)`	Compute the commutator of two operators.
`count_qubits(operator)`	Calculate the number of qubits on which operator acts before removing the unused qubit.
`down_index(index)`	Down index getter function.
`get_fermion_operator(...)`	Convert the tensor (PolynomialTensor) to FermionOperator.
`ground_state_of_sum_zz(ops)`	Find the ground state energy of qubit operator that only has pauli \(Z\) term.
`hermitian_conjugated(...)`	Return Hermitian conjugate of FermionOperator or QubitOperator.
`normal_ordered(...)`	Calculate and return the normal order of the FermionOperator.
`number_operator([...])`	Return a fermionic number operator for the reverse_jordan_wigner transform.
`sz_operator(...)`	Return the sz operator.
`up_index(index)`	Up index getter function.