qiskit.opflow.converters#
Converters (qiskit.opflow.converters)#
バージョン 0.24.0 で非推奨: The qiskit.opflow module is deprecated and will be removed no earlier
than 3 months after the release date. For code migration guidelines,
visit https://qisk.it/opflow_migration.
Converters are objects which manipulate Operators, usually traversing an Operator to
change certain sub-Operators into a desired representation. Often the converted Operator is
isomorphic or approximate to the original Operator in some way, but not always. For example,
a converter may accept CircuitOp and return a
SummedOp of
PauliOp’s representing the
circuit unitary. Converters may not have polynomial space or time scaling in their operations.
On the contrary, many converters, such as a
MatrixExpectation or
MatrixEvolution,
which convert PauliOp’s to
MatrixOp’s internally, will require time or space
exponential in the number of qubits unless a clever trick is known
(such as the use of sparse matrices).
注釈
Not all converters are in this module, as expectations
and evolutions are also converters.
Converter Base Class#
The converter base class simply enforces the presence of a convert() method.
Deprecated: Converters take an Operator and return a new Operator, generally isomorphic in some way with the first, but with certain desired properties. |
Converters#
In addition to the base class, directory holds a few miscellaneous converters which are used frequently around the Operator flow.
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Deprecated: The CircuitSampler traverses an Operator and converts any CircuitStateFns into approximations of the state function by a DictStateFn or VectorStateFn using a quantum backend. |
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Deprecated: The AbelianGrouper converts SummedOps into a sum of Abelian sums. |
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Deprecated: Converts |
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Deprecated: Converter for changing Paulis into other bases. |
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Deprecated: Two qubit reduction converter which eliminates the central and last qubit in a list of Pauli that has diagonal operators (Z,I) at those positions. |