DictStateFn¶

class
DictStateFn
(primitive=None, coeff=1.0, is_measurement=False)[source]¶ Bases :
qiskit.aqua.operators.state_fns.state_fn.StateFn
A class for state functions and measurements which are defined by a lookup table, stored in a dict.
 Paramètres
primitive (
Union
[str
,dict
,Result
,None
]) – The dict, single bitstring (if defining a basis sate), or Qiskit Result, which defines the behavior of the underlying function.coeff (
Union
[int
,float
,complex
,ParameterExpression
]) – A coefficient by which to multiply the state function.is_measurement (
bool
) – Whether the StateFn is a measurement operator.
 Lève
TypeError – invalid parameters.
Methods
Return Operator addition of self and other, overloaded by
+
.Return a new Operator equal to the Operator’s adjoint (conjugate transpose), overloaded by
~
.Binds scalar values to any Terra
Parameters
in the coefficients or primitives of the Operator, or substitutes oneParameter
for another.Same as assign_parameters, but maintained for consistency with QuantumCircuit in Terra (which has both assign_parameters and bind_parameters).
Composition (Linear algebrastyle: A@B(x) = A(B(x))) is not well defined for states in the binary function model, but is well defined for measurements.
Evaluate Equality between Operators, overloaded by
==
.Evaluate the Operator’s underlying function, either on a binary string or another Operator.
Returns the scalar multiplication of the Operator, overloaded by
*
, including support for Terra’sParameters
, which can be bound to values later (viabind_parameters
).Return the Operator’s negation, effectively just multiplying by 1.0, overloaded by

.Permute the qubits of the state function.
Compose with Self Multiple Times, undefined for StateFns.
Return a set of strings describing the primitives contained in the Operator.
Try collapsing the Operator structure, usually after some type of conversion, e.g.
Sample the state function as a normalized probability distribution.
Return tensor product between self and other, overloaded by
^
.Return tensor product with self multiple times, overloaded by
^
.Return
StateFnCircuit
corresponding to this StateFn.Return matrix representing product of StateFn evaluated on pairs of basis states.
Attempt to return the Legacy Operator representation of the Operator.
Return NumPy representation of the Operator.
Return a
VectorStateFn
for thisStateFn
.Same as to_matrix, but returns csr sparse matrix.
Apply the convert_fn to the internal primitive if the primitive is an Operator (as in the case of
OperatorStateFn
).Attributes

ENABLE_DEPRECATION
= True¶

INDENTATION
= ' '¶

coeff
¶ A coefficient by which the state function is multiplied.
 Type renvoyé
Union
[int
,float
,complex
,ParameterExpression
]

is_measurement
¶ Whether the StateFn object is a measurement Operator.
 Type renvoyé
bool

num_qubits
¶  Type renvoyé
int

parameters
¶

primitive
¶ The primitive which defines the behavior of the underlying State function.