mirror of https://github.com/Qiskit/qiskit.git
26 lines
1.2 KiB
YAML
26 lines
1.2 KiB
YAML
---
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features:
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Added a new abstract method
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:meth:`qiskit.quantum_info.Operator.dot` to
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the abstract ``BaseOperator`` class, so it is included for all
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implementations of that abstract
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class, including :class:`qiskit.quantum_info.Operator` and
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``QuantumChannel`` (e.g., :class:`qiskit.quantum_info.Choi`)
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objects. This method returns the right operator multiplication
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``a.dot(b)`` :math:`= a \cdot b`. This is equivalent to
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calling the operator
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:meth:`qiskit.quantum_info.Operator.compose` method with the kwarg
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``front`` set to ``True``.
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upgrade:
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Changed :class:`qiskit.quantum_info.Operator` magic methods so that
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``__mul__`` (which gets executed by python's multiplication operation,
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if the left hand side of the operation has it defined) implements right
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matrix multiplication (i.e. :meth:`qiskit.quantum_info.Operator.dot`), and
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``__rmul__`` (which gets executed by python's multiplication operation
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from the right hand side of the operation if the left does not have
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``__mul__`` defined) implements scalar multiplication (i.e.
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:meth:`qiskit.quantum_info.Operator.multiply`). Previously both methods
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implemented scalar multiplication.
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