HamiltonianGate

class HamiltonianGate(data, time, label=None)

Bases: qiskit.circuit.gate.Gate

Class for representing evolution by a Hermitian Hamiltonian operator as a gate. This gate resolves to a UnitaryGate U(t) = exp(-1j * t * H), which can be decomposed into basis gates if it is 2 qubits or less, or simulated directly in Aer for more qubits.

Create a gate from a hamiltonian operator and evolution time parameter t

Parameters

• data (matrix or Operator) – a hermitian operator.

• time (float) – time evolution parameter.

• label (str) – unitary name for backend [Default: None].

Raises

ExtensionError – if input data is not an N-qubit unitary operator.

Methods

add_decomposition	Add a decomposition of the instruction to the SessionEquivalenceLibrary.
adjoint	Return the adjoint of the unitary.
assemble	Assemble a QasmQobjInstruction
broadcast_arguments	Validation and handling of the arguments and its relationship.
c_if	Add classical condition on register or cbit classical and value val.
conjugate	Return the conjugate of the Hamiltonian.
control	Return controlled version of gate.
copy	Copy of the instruction.
inverse	Return the adjoint of the unitary.
is_parameterized	Return True .IFF.
mirror	DEPRECATED: use instruction.reverse_ops().
power	Creates a unitary gate as gate^exponent.
qasm	Raise an error, as QASM is not defined for the HamiltonianGate.
repeat	Creates an instruction with gate repeated n amount of times.
reverse_ops	For a composite instruction, reverse the order of sub-instructions.
soft_compare	Soft comparison between gates.
to_matrix	Return a Numpy.array for the gate unitary matrix.
transpose	Return the transpose of the Hamiltonian.
validate_parameter	Hamiltonian parameter has to be an ndarray, operator or float.

Attributes

decompositions

Get the decompositions of the instruction from the SessionEquivalenceLibrary.

definition

Return definition in terms of other basic gates.

duration

Get the duration.

label

Return instruction label

Return type

str

params

return instruction params.

unit

Get the time unit of duration.