mirror of https://github.com/Qiskit/qiskit.git
18 lines
619 B
YAML
18 lines
619 B
YAML
---
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features:
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- |
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Added the :func:`qiskit.quantum_info.partial_trace` function to the
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:mod:`qiskit.quantum_info` that works with
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:class:`qiskit.quantum_info.Statevector` and
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:class:`qiskit.quantum_info.DensityMatrix` quantum state classes.
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For example::
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from qiskit.quantum_info.states import Statevector
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from qiskit.quantum_info.states import DensityMatrix
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from qiskit.quantum_info.states import partial_trace
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psi = Statevector.from_label('10+')
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partial_trace(psi, [0, 1])
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rho = DensityMatrix.from_label('10+')
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partial_trace(rho, [0, 1])
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