mirror of https://github.com/Qiskit/qiskit-aer.git
Prepare 0.11.0 release (#1601)
* Prepare 0.11.0 release This commit prepares for the 0.11.0 release. It moves the release notes to a self contained directory for the release and updates the wording and details of the release notes. Once this commit merges it should be the tagged commit for the release. * Apply suggestions from code review Co-authored-by: Jake Lishman <jake@binhbar.com> Co-authored-by: Jake Lishman <jake@binhbar.com>
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Matthew Treinish
GitHub
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---
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features:
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- |
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Added support for :class:`~.BackendV2` to
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:meth:`~.NoiseModel.from_backend`.
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Now it can generate a :class:`~.NoiseModel` object from an
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input :class:`~.BackendV2` instance. When a :class:`~.BackendV2`
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input is used on :meth:`~.NoiseModel.from_backend` the two deprecated
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options, ``standard_gates`` and ``warnings``, are gracefully ignored.
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---
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features:
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- |
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Added Aer implementation of :mod:`~qiskit.primitives`,
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:class:`~.qiskit_aer.primitives.Sampler` and :class:`~.qiskit_aer.primitives.Estimator.
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Thes implementations of the :class:`~qiskit.primitives.BaseSampler` and
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:class:`~qiskit.primitives.BaseEstimator` interfaces leverage qiskit aer to
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efficiently perform the computation of the primitive operations. You can
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refer to the :mod:`qiskit.primitives` docs for a more detailed description
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of the primitives API.
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---
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features:
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- |
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Added a shared library to Qiskit Aer that allows external programs to use
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Aer's simulation methods. This is an experimental feature and its API
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may be changed without the deprecation period.
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---
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upgrade:
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- |
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Set default ``fusion_max_qubit`` and ``fusion_threshold`` depending on the configured
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``method`` for :class:`~AerSimulator`. Previously, the default values of
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``fusion_max_qubit`` and ``fusion_threshold`` were ``5`` and ``14`` respectively for
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all simulation methods. However, their optimal values depend on running methods. If you
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depended on the previous defaults you can explicitly set ``fusion_max_qubit=5`` or
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``fusion_threshold=14`` to retain the previous default behavior. For example::
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from qiskit_aer import AerSimulator
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sim = AerSimulator(method='mps', fusion_max_qubit=5, fusion_threshold=14)
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---
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prelude: |
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The Qiskit Aer 0.11.0 release highlights are:
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* The migration to a new self-contained Python namespace ``qiskit_aer``
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* The introduction of the :class:`~.AerStatevector` class
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* The introduction of Aer implementations of :mod:`~qiskit.primitives`,
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:class:`~qiskit_aer.primitives.Sampler` and :class:`~qiskit_aer.primitives.Estimator`
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* Introduction of support for running with `cuQuantum <https://developer.nvidia.com/cuquantum-sdk>`__
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---
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features:
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- |
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Added support for ``BackendV2`` to :meth:`~qiskit.providers.aer.noise.NoiseModel.from_backend`.
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Now it can generate ``NoiseModel`` from a valid ``BackendV2``, in which case
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the two deprecated options, ``standard_gates`` and ``warnings``, are gracefully ignored.
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---
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features:
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- |
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Added Aer implementation of Primitives (:class:`~primitives.Sampler` and :class:`~primitives.Estimator`).
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See the docs https://qiskit.org/documentation/apidoc/primitives.html for general descriptions.
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---
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features:
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- |
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Added support for running with Python 3.10. This includes publishing
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precompiled binaries to PyPI for Python 3.10 on supported platforms.
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upgrade:
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- |
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Qiskit Aer no longer fully supports 32 bit platforms on Python >= 3.10.
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These are Linux i686 and 32-bit Windows. These platforms with Python 3.10
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are now at Tier 3 instead of Tier 2 support (per the tiers defined in:
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https://qiskit.org/documentation/getting_started.html#platform-support)
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This is because the upstream dependencies Numpy and Scipy have dropped
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support for them. Qiskit will still publish precompiled binaries for these
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platforms, but we're unable to test the packages prior to publishing, and
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you will need a C/C++ compiler so that ``pip`` can build their dependencies
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from source. If you're using one of these platforms, we recommended that
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you use Python 3.7, 3.8, or 3.9.
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---
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features:
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- |
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Add Aer runtime shared library that allows external programs can use
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Aer simulation methods. This is an experimental fature and its API
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may be changed without the deprecation period.
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---
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features:
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- |
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Set default ``fusion_max_qubit`` and ``fusion_threshold`` depending on `method`.
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Previously default values of ``fusion_max_qubit`` and ``fusion_threshold`` were
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``5`` and ``14`` respectively in any methods. However, their optimal values
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depend on running methods. This feature changes their default values depending
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on a configured method.
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---
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fixes:
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- |
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Fix cache blocking transpiler to recognize superop to be cache blocked.
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This is fix for
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`issue 1479 <https://github.com/Qiskit/qiskit-aer/issues/1479>`
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now density_matrix with noise models can be parallelized.
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New test, test_noise.TestNoise.test_kraus_gate_noise_on_QFT_cache_blocking
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is added to verify this issue.
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Also this fix include fix for
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`issue 1483 <https://github.com/Qiskit/qiskit-aer/issues/1483>`
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discovered by adding new test case.
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This fixes measure over chunks for statevector.
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---
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fixes:
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- |
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Fixes an issue with :class:`.LocalNoisePass` for noise functions that
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return a :class:`.QuantumCircuit` for the noise op. These were appended
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to the DAG as an opaque circuit instruction that must be unrolled to be
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simulated. This fix composes them so that the cirucit instructions are
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added to the new DAG and can be simulated without additional unrolling
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if all circuit instructions are supported by the simulator.
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See `#1447 <https://github.com/Qiskit/qiskit-aer/issues/1447>`__
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for details.
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---
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fixes:
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- |
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device=Thrust was very slow for small number of qubits because OpenMP
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threading was always applied. This fix applies OpenMP threads as same
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as device=CPU by using statevector_parallel_threshold.
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---
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fixes:
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- |
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Multi-threaded transpilations to generate diagonal gates will now work correctly if
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the number of gates of a circuit exceeds ``fusion_parallelization_threshold``.
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Previously, different threads would occasionally fuse the same element into multiple blocks,
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causing incorrect results.
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---
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upgrade:
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Qiskit Aer is no longer compiled with unsafe floating-point optimisations.
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While most of the effects should have been localised to Qiskit Aer, some
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aspects of subnormal handling may previously have been leaked into user code
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by the library incorrectly setting the "flush to zero" mode. This will not
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happen any more.
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fixes:
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Qiskit Aer will no longer set the floating-point mode to "flush to zero"
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when loaded. Downstream users may previously have seen warnings from Numpy
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such as:
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The value of the smallest subnormal for <class 'numpy.float64'> type is zero.
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These will now no longer be emitted, and the floating-point handling will be
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correct.
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---
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fixes:
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Fixed a potential issue with running simulations on circuits that have the
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:attr:`.QuantumCircuit.metadata` attribute set. The :attr:`~.QuantumCircuit.metadata`
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attribute can be any python dictionary and previously qiskit-aer would attempt to
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JSON serialize the contents of the attribute to process it with the rest of the rest
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of the circuit input, even if the contents were not JSON serializable. This no longer
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occurs as the :attr:`.QuantumCircuit.metadata` attribute is not used to run the
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simulation so now the contents are no serialized and instead are directly attached
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to the :class:`qiskit.result.Result` object without attempting to JSON serialize
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the contents.
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Fixed `#1435 <https://github.com/Qiskit/qiskit-aer/issues/1435>`__
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---
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fixes:
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Fixes a bug with truncation of circuits in parameterized Qobjs.
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Previously parameters of parameterized QObj could be wrongly resolved
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if unused qubits of their circuits were truncated, because indices of
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the parameters were not updated after the instructions on unmeasured qubits
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were removed.
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See `#1427 <https://github.com/Qiskit/qiskit-aer/issues/1427>`__
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for details.
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