What's Changed

• Rust fix and more obsolete code fixes by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2325

Full Changelog: https://github.com/Qiskit/qiskit-aer/compare/0.16.3...0.16.4

What's Changed

• Removal of deprecated Qiskit 2.0 related code by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2318

Full Changelog: https://github.com/Qiskit/qiskit-aer/compare/0.16.2...0.16.3

What's Changed

• Removal of deprecated Qiskit 2.0 related code by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2318
• Temporarily remove rust from build by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2324

Full Changelog: https://github.com/Qiskit/qiskit-aer/compare/0.16.2...0.16.3

What's Changed

• Removed some code that is never executed and an unused parameter by @aromanro in https://github.com/Qiskit/qiskit-aer/pull/2314
• Backend-related deprecations by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2322

Full Changelog: https://github.com/Qiskit/qiskit-aer/compare/0.16.1...0.16.2

What's Changed

• Add wildcard by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2288
• Add Python3.13 support and remove Python 3.8 support by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2287
• Fix QubitVector::check_dimension to use only the data_size_ field by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2289
• Adjust QuantumError.to_dict() to handle lack of Instruction.condition by @mtreinish in https://github.com/Qiskit/qiskit-aer/pull/2301
• Version update to 0.16.1 by @gadial in https://github.com/Qiskit/qiskit-aer/pull/2313

Full Changelog: https://github.com/Qiskit/qiskit-aer/compare/0.16.0.1...0.16.1

Aer 0.15.1 is a bugfix release to Aer 0.15.

Bug fixes

• add truncation to save_expval operation to minimize memory requirements
• Fix memory estimator for MPS

For backward compatibilities, we reverted the following features

• Add open_pulse entry to AerBackendConfiguration
• Revert NoiseModel.from_dict However these features are deprecated and we will remove again in the future release

This is bugfix release to 0.14.1 and fix for Qiskit 1.1

This release includes PRs:

• #2119
• #2142
• #2128
• #2138
• #2143
• #2109
• #2110
• #2120
• #2132
• #2137
• #2146
• #2148
• #2147
• #2151
• #2153

This is bug fix release to 0.14.0.1

• #2094
• #2095
• #2098
• #2101
• #2105
• #2106

Changelog

Fixed

• Fix GPU wheel builds on release (#2034)
• Fixes of tests for the latest Qiskit (#2026)
• Fix test cases for Qiskit 0.45.2 (#2035)
• Fixes of tests for the latest Qiskit (#2026)

This is bugfix and software update release to Aer 0.13.1

This release includes support for Python 3.12

Aer 0.13.1 release is bug fix release for Aer 0.13.0.

What's Changed

• Release 0.13.1 by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1983

Full Changelog: https://github.com/Qiskit/qiskit-aer/compare/0.13.0...0.13.1

Since we can not upload GPU distributions to PyPI, we put them on this page. Please download one for your environment and type pip install qiskit_aer_gpu*

Change Log

Added

• add code-formatting with black for python and with clang-format for c++ by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1630
• Add git blame ignore file by @mtreinish in https://github.com/Qiskit/qiskit-aer/pull/1745
• Add Tutorials to Documentation Page by @hitomitak in https://github.com/Qiskit/qiskit-aer/pull/1768
• Add API docs for QuantumCircuit methods by @hitomitak in https://github.com/Qiskit/qiskit-aer/pull/1753
• Activate jQuery in docs by @Eric-Arellano in https://github.com/Qiskit/qiskit-aer/pull/1802
• Support SwitchCaseOp that will be released in qiskit-terra 0.24.0 by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1778
• Add Getting Started page by @hitomitak in https://github.com/Qiskit/qiskit-aer/pull/1780
• Support parameterized global phase by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1814
• Batch QuantumCircuit with multiple parameter_binds by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1840
• Support QuantumCircuit.initialize(int, qubits[]) by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1841
• Support save_statevector for QuantumCircuit from QASM3 string by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1846
• New GPU binaries with cuQuantum support by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1854
• Support u3 gate application in Aer runtime API by @ibm-wakizaka in https://github.com/Qiskit/qiskit-aer/pull/1876
• Adding circuit executor classes and shot-branching by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1766
• Implemented ecr for stabilizer simulator. by @MarcMaussner in https://github.com/Qiskit/qiskit-aer/pull/1892
• Enable ROCm target based on existing CUDA/Thrust implementation. by @sfantao in https://github.com/Qiskit/qiskit-aer/pull/1914
• Add rotation gates to stabilizer by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1938
• Improve performance of sampler experiment by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1935
• Implementing runtime parameter binding by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1901
• Implementation and test of QuantumError.from_dict. by @MarcMaussner in https://github.com/Qiskit/qiskit-aer/pull/1942
• enable c_if for reset and raise exception if instruction does not support c_if by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1868
• Add test case to serialize result of simulation by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1869
• Support Expr that Terra 0.24 newly introduced by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1915
• Add test for unreleased Qiskit by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1950
• support transpilation of switch_case by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1962
• Support BackendV2 by @hitomitak in https://github.com/Qiskit/qiskit-aer/pull/1875

Fixed

• Fix how to reference to config.cuStateVec_enable by @derwind in https://github.com/Qiskit/qiskit-aer/pull/1749
• Ensure QuantumCircuit.metadata is always a dict by @ihincks in https://github.com/Qiskit/qiskit-aer/pull/1761
• Fix #1764 (variance type in Estimator) by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1767
• Fix wrong set of parameters in circuits with barriers by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1775
• Resolve regression from introduction of AER::Config by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1747
• Fix setting MPI processes and ranks by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1808
• Fix library path to cuQuantum and cuTENSOR by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1801
• Fix cuQuantum static linking by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1812
• Updated docstrings of depolarizing_error function in standard_errors.py by @deji725 in https://github.com/Qiskit/qiskit-aer/pull/1799
• Add implicit cast of argument types by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1770
• Fix handling of None in noise model construction from BackendV2 by @itoko in https://github.com/Qiskit/qiskit-aer/pull/1818
• Avoid kernel crash from blas call errors by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1791
• fix fail of qobj run without run_options by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1792
• Check parameter_binds arguments for parameterized circuits by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1817
• Set the number of qubits with the coupling map by @hitomitak in https://github.com/Qiskit/qiskit-aer/pull/1825
• Use transpile and run instead of execute in docstring by @dakk in https://github.com/Qiskit/qiskit-aer/pull/1830
• Fix Renew example codes in README #1806: qiskit.providers.ibmq is deprecated; ibmq_athens is not available by @davidlearn in https://github.com/Qiskit/qiskit-aer/pull/1831
• Warn if approximation=False and shots=None in Estimator by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1823
• Fix the grouping index bug in Estimator by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1839
• validate parameters of each gate in a circuit by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1834
• Fix MPI build break by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1842
• Fix a bug in aer_apply_measure in libaer and enable libaer build in Mac by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1860
• Fix param positions for circuits with conditionals by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1851
• Fix dynamic link in GPU binary distribution by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1877
• Fix OpenMP nested parallel by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1880
• Fix required_memory_mb by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1881
• Fix an issue in aer_state_initialize() of C API by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1885
• Fix link to Qiskit's bib-file by @Cryoris in https://github.com/Qiskit/qiskit-aer/pull/1887
• correct bit ordering in measure of state_controller by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1898
• Fix noise model construction for a backend with no T2 value for a qubit by @itoko in https://github.com/Qiskit/qiskit-aer/pull/1912
• Make vector allocation aligned to 64-bytes by @sfantao in https://github.com/Qiskit/qiskit-aer/pull/1909
• Fix for https://github.com/Qiskit/qiskit-aer/issues/1925 (Aer runtime… by @aromanro in https://github.com/Qiskit/qiskit-aer/pull/1926
• Fix measure in stabilizer method by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1895
• Fix for https://github.com/Qiskit/qiskit-aer/issues/1918 by @aromanro in https://github.com/Qiskit/qiskit-aer/pull/1922
• Fix required_memory_mb for MPS and extended stabilizer by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1933
• Fix incorrect excited state population when building noise model from BackendV2 by @itoko in https://github.com/Qiskit/qiskit-aer/pull/1939
• Fix the order bug in Estimator by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1936
• Fix nested parallel performance by @doichanj in https://github.com/Qiskit/qiskit-aer/pull/1949
• Fix templates documentation by @arnaucasau in https://github.com/Qiskit/qiskit-aer/pull/1961

Deprecated

• Deprecate approximation option in Estimator by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1963

Removed

• Remove redundant wheel dep from pyproject.toml by @thesamesam in https://github.com/Qiskit/qiskit-aer/pull/1741
• Remove a release note in an invalid location by @derwind in https://github.com/Qiskit/qiskit-aer/pull/1750
• Remove REQUIRED to find PythonLibs in FindPybind11 by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1786
• Remove Sampler.close, assert DeprecationWarning of opflow, and update dependency by @ikkoham in https://github.com/Qiskit/qiskit-aer/pull/1804
• Remove AerCircuit from result of backend.run() by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1845
• Remove Python 3.7 from Github actions by @tungbq in https://github.com/Qiskit/qiskit-aer/pull/1819
• Remove PulseSimulator by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1884
• remove deploy documentation to /documentation/aer by @1ucian0 in https://github.com/Qiskit/qiskit-aer/pull/1891

Changed

• use omp_set_max_active_levels instead of omp_set_nested by @hhorii in https://github.com/Qiskit/qiskit-aer/pull/1752
• Upgrade to qiskit_sphinx_theme 1.12 by @Eric-Arellano in https://github.com/Qiskit/qiskit-aer/pull/1822
• move travis file to gha in the README by @1ucian0 in https://github.com/Qiskit/qiskit-aer/pull/1943
• Update usage of QuantumCircuit.id by @Cryoris in https://github.com/Qiskit/qiskit-aer/pull/1945
• Move methods into class pages for docs by @arnaucasau in https://github.com/Qiskit/qiskit-aer/pull/1958
• Update Sphinx theme by @arnaucasau in https://github.com/Qiskit/qiskit-aer/pull/1946

New Contributors

• @thesamesam made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1741
• @ihincks made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1761
• @SquidDev made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1760
• @Eric-Arellano made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1802
• @deji725 made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1799
• @Innanov made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1827
• @dakk made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1830
• @TerraVenil made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1833
• @davidlearn made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1831
• @tungbq made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1819
• @ibm-wakizaka made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1876
• @Cryoris made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1887
• @MarcMaussner made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1892
• @sfantao made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1903
• @aromanro made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1907
• @arnaucasau made their first contribution in https://github.com/Qiskit/qiskit-aer/pull/1958

Full Changelog: https://github.com/Qiskit/qiskit-aer/compare/0.12.0...0.13.0

Changelog

Fixed

• Remove AerCircuit from result of backend.run() (#1845)
• Fix the grouping index bug in Estimator (#1839)
• Fix param positions for circuits with conditionals (#1851)
• Support save_statevector for QuantumCircuit from QASM3 string (#1846)
• New GPU binaries with cuQuantum support (#1854)

Changelog

Fixed

• Fix the grouping index bug in Estimator (#1839)
• Fix handling of None in noise model construction from BackendV2 (#1818)
• Support initialize with int (#1841)
• Do not use circuit metadata to internally manage simulation results (#1772)
• Validate parameters of each gate in a circuit (#1834)
• Warn if approximation=False and shots=None in Estimator (#1823)
• Upgrade to qiskit_sphinx_theme 1.12 (#1822)
• Fix Renew example codes in README #1806: qiskit.providers.ibmq is deprecated; ibmq_athens is not available (#1831)
• Fix typos in aer_simulator, qasm_simulator docs (#1833)
• Use transpile and run instead of execute in docstring (#1830)
• Fixing some typos (#1827)
• Set the number of qubits with the coupling map (#1825)
• check parameter_binds arguments for parameterized circuits (#1817)
• Support parameterized global phase (#1814)
• fix fail of qobj run without run_options (#1792)
• avoid kernel crash from blas call errors (#1791)
• Add Getting Started page (#1780)
• Add implicit cast of argument types (#1770)
• Update standard_errors.py (#1799)
• fix cuQuantum static linking (#1812)
• Support SwitchCaseOp that will be released in qiskit-terra 0.24.0 (#1778)
• Activate jQuery in docs (#1802)
• Fix library path to cuQuantum and cuTENSOR (#1801)
• Fix setting MPI processes and ranks (#1808)
• Remove Sampler.close, assert DeprecationWarning of opflow, and update dependency (#1804)
• Resolve regression from introduction of AER::Config (#1747)
• Add API docs for QuantumCircuit methods (#1753)
• Fix wrong set of parameters in circuits with barriers (#1775)
• Defer gathering backends until they are needed (#1760)
• Add Tutorials to Documentation Page (#1768)
• Correct a type of variance from complex to real (#1767)
• use omp_set_max_active_levels instead of omp_set_nested (#1752)
• Fix how to reference to config.cuStateVec_enable (#1749)
• Remove a release note in an invalid location (#1750)
• add code-formatting with black for python and with clang-format for c++ (#1630)

Changelog

Deprecated

• Deprecate PulseSimulator backend (#1728)
• Deprecate Python 3.7 support in Qiskit Aer (#1671)

Added

• Simulate QuantumCircuit without QObj (#1717)
• Add NoiseModel.from_backend_properties (#1474)
• Add support for Python 3.11 (#1642)

Changed

• Remove setup_requires and forced pip installs in setup.py (#1693)

Removed

• Remove qobj argument, deprecated in 0.8.0 (#1635)

Fixed

• Fix Sampler with multiple classical registers (#1680)
• Fix BackendV2 support in AerSimulator.from_backend() (#1678)
• Specify package_data explicitly (#1677)
• Set different seed for each sampling in AerStatevector (#1663)
• Fix incorrect computation of excited state population (#1672)
• Fix device noise model from BackendV2 not to have excessive quantum errors on measures/resets (#1649)
• Fix data-flow analysis in control-flow jump/mark (#1666)
• Remove verbose warnings on parameter truncations when creating noise model from backend (#1639)
• Fix handling of instructions with clbits in LocalNoisePass (#1625)

Changelog

Added

• Add support for Python 3.11 (#1642)

Fixed

• Fix BackendV2 support in AerSimulator.from_backend() (#1678)
• Specify package_data explicitly (#1677)
• Set different seed for each sampling in AerStatevector (#1663)
• Fix incorrect computation of excited state population (#1672)
• Fix device noise model from BackendV2 not to have excessive quantum errors on measures/resets (#1649)
• Fix data-flow analysis in control-flow jump/mark (#1666)
• Remove verbose warnings on parameter truncations when creating noise model from backend (#1639)

Changelog

Fixed

• Fix CMakeList.txt to support cmake 3.18 or later (#1613)
• Primitives support run method in Terra 0.22 (#1598)
• Fix handling of instructions with clbits in LocalNoisePass (#1625)
• Sampler caches transpiled circuits (#1618)

Changelog

Added

• Add libaer.so (#1582)
• Add cross-build wheel jobs for ppc64le and s390x (#1504)
• Add support for BackendV2 in NoiseModel.from_backend (#1484)
• Add support for Python 3.10 (#1434)
• Add CI jobs to cross-build arm64 macOS wheels (#1362)

Changed

• Move Aer to its own package (#1526)
• Do not build with -ffast-math (#1469)

Removed

• remove snapshot instruction from qiskit_aer (#1591)
• Drop support for Python 3.6 (#1430)

Fixed

• fix an issue of while_loop at the tail of a circuit (#1600)
• inline a circuit to initialize statevector (#1519)
• Fix handling of circuit metadata (#1436)
• Fix: cache blocking transpiler for density_matrix with noises (#1480)
• Change to truncate T2 up to 2 * T1 in NoiseModel.from_backend (#1467)
• Do not build with -ffast-math (#1469)
• Fix time_taken value in cluster backend (#1437)
• revert #1392 for performance with fix of omp (#1438)
• Fix LocalNoisePass for circuit returns from noise func (#1455)
• Fix unit handling in RelaxationNoisePass (#1454)
• Run truncation after resolving parameters (#1428)
• Fix diagonal fusion in parallel transpile (#1422)
• Fix bug in QuantumError.to_dict (#1420)
• Fix simulation of for loops with no parameter (#1419)
• Add try block for backend noise model delay pass (#1414)
• fix Pauli noise with pauli gate (#1411)
• Reduce unnecessary circuit iteration (#1409)
• Fix performance regression from QuantumError.to_dict (#1408)

Changelog

Changed

• Do not build with -ffast-math (#1469)

Fixed

• Fix handling of circuit metadata (#1436)
• Fix: cache blocking transpiler for density_matrix with noises (#1480)
• Change to truncate T2 up to 2 * T1 in NoiseModel.from_backend (#1467)
• Do not build with -ffast-math (#1469)

Changelog

Added

• Add support for Python 3.10 (#1434)
• Add CI jobs to cross-build arm64 macOS wheels (#1362)

Fixed

• Fix diagonal fusion in parallel transpile (#1422)
• Fix time_taken value in cluster backend (#1437)
• revert #1392 for performance with fix of omp (#1438)
• Fix LocalNoisePass for circuit returns from noise func (#1455)
• Fix unit handling in RelaxationNoisePass (#1454)
• Run truncation after resolving parameters (#1428)

Changelog

Fixed

• Fix bug in QuantumError.to_dict (#1420)
• Fix simulation of for loops with no parameter (#1419)

Changelog

Fixed

• Add try block for backend noise model delay pass (#1414)
• fix Pauli noise with pauli gate (#1411)
• Reduce unnecessary circuit iteration (#1409)
• Fix performance regression from QuantumError.to_dict (#1408)

Changelog

Added

• Add support for adding QuantumError to circuits (#1350)

Fixed

• Include pyproject.toml in sdist (#1380)
• Fix automatic method selection when some circuits have invalid instructions (#1371)
• Ensure error results include empry results field (#1372)
• Fix issue 1351 (#1354)
• Fix handling of bound ParameterExpressions (#1356)
• Fix 1347 (#1355)

Changelog

Fixed

• Fix automatic method selection when some circuits have invalid instructions (#1371)
• Ensure error results include empry results field (#1372)
• Fix issue 1351 (#1354)
• Fix handling of bound ParameterExpressions (#1356)
• Fix 1347 (#1355)

Changelog

Deprecated

• Deprecate run(qobj) (#1328)
• Deprecate snapshot instructions (#1270)
• Deprecate non-local quantum errors (#1314)

Added

• Add parameter_binds to aerbackend.run (#1317)
• Add cu and sxdg basis gates (#1326)
• Cluster backend (#1281)

Removed

• Remove code deprecated in 0.7.0 (#1311)

Fixed

• Fix issue 1258 (#1345)
• Fix normalization following approximation in MPS (#1335)
• user omp threadprivate in qv simd kernel (#1342)
• add synchronization before read/write states on GPU (#1325)
• Fix shots option (#1313)
• Fix bug in extended stabilizer simulator (#1320)
• Avoid deprecated bit index lookup in insert_noise (#1301)
• fix an issue of temporal memory allocation in avx (#1291)
• MPI parallelization fix (#1278)
• fix phase normalisation issue in scalar_t::to_complex method (#1276)
• Fixed bug in MPS::apply_matrix (#1261)
• Disable save expectation value for ext stabilizer (#1238)
• Change qubits order in multiplexer gate (#1230)
• Fix stabilizer simulator expval function (#1231)
• Fix configuration.basis_gates performance issue (#1232)
• Fixes of multi-chunk simulators (#1200)
• Normalize statevector save and snapshot for extended stabilizer method (#1221)
• Allow measure sampling with initialize (#1219)
• Add python iterables to to_json conversion method (#1217)
• Fix JSON serialized of empty data (#1218)
• Bug fix for MPS::apply_kraus (#1206)
• Disable GPU methods if no device available (#1213)

Changelog

Fixed

• Disable save expectation value for ext stabilizer (#1238)
• Change qubits order in multiplexer gate (#1230)
• Fix stabilizer simulator expval function (#1231)
• Fix configuration.basis_gates performance issue (#1232)
• Fixes of multi-chunk simulators (#1200)

Changelog

Fixed

• Normalize statevector save and snapshot for extended stabilizer method (#1221)
• Allow measure sampling with initialize (#1219)
• Add python iterables to to_json conversion method (#1217)
• Fix JSON serialized of empty data (#1218)
• Bug fix for MPS::apply_kraus (#1206)
• Disable GPU methods if no device available (#1213)

Changelog

Added

• Add AerSimulator backend (#1194)
• Allow disabling of dependency installation in setup.py (#1135)
• Add instructions to set simulator state (#1163)
• Migrate to new provider interface (#1099)
• Support for saving statevector as ket dictionary (#820)
• Add general SaveState instruction (#1164)
• Add Fusion variations (#1110)
• Add arm64 release wheel jobs (#1162)
• Add SaveUnitary and SaveStabilizer instructions (#1136)
• Add SaveAmplitudes and SaveAmplitudesSquared instructions. (#1129)
• Add SaveProbabilities and SaveProbabilitiesDict instructions (#1117)
• Add SaveStatevector and SaveDensityMatrix instructions (#1116)
• Add new save expectation value instructions (#1101)
• Adding gates to the MPS simulator (#1088)
• Parallel Qiskit Aer (GPU + MPI) by using cache blocking transpiler (#788)
• parallelize fusion transpilation (#1103)
• Enhancement of multi-controlled gates (#1076)
• Compile CUDA on win (#1065)
• Cmake: make conan optional (#999)
• Add PauliGate to density matrix simulator (#1012)
• Multiple Pauli gates operation (#919)

Changed

• Add SaveStatevector and SaveDensityMatrix instructions (#1116)
• Add new save expectation value instructions (#1101)

Fixed

• Fixed bug in apply_kraus in matrix_product_state (#1188)
• Add reading of qubit_lo_freq from pulse Schedule config (#1185)
• Always set config.local to True (#1187)
• Fixed bug in sample_measure_using_probabilities (#1132)
• change default max_memory_mb from half to full system memory (#1152)
• Fix noise sampling for conditional gates (#1154)
• Fix macos tests in CI (#1115)
• Fix bugs in automatic updates of simulator configuration basis gates (#1109)
• Fix noise model basis_gates when constructing from device (#1108)
• Fixed normalization in MPS truncation (#1094)
• Fix condtional instructions using c_if not working for reg of size>=64 on BasicAer backend (#1089)
• Fix bug with nested omp being applied incorrectly (#1055)
• Fixed the tests and the revealed bugs (#1026)
• Corrected qubits ordering in MPS::sample_measure_using_probabilities. (#1011)
• Fixed bug in MPS::apply_kraus (#1003)
• Fix Aer provider to return new backend instances with backends/get_backend. (#1006)
• Fix bug in unsupported instructions error message (#1005)

Changelog

Added

• Add arm64 release wheel jobs (#1162)

Fixed

• Fixed bug in sample_measure_using_probabilities (#1132)
• change default max_memory_mb from half to full system memory (#1152)
• Fix noise sampling for conditional gates (#1154)

Changelog

Fixes

• Fix numpy compatibility with numpy < 1.20.0 in precompiled wheels (#1131)

Changelog

Fixed

• Fix numpy 1.20.0 compatibility (#1115)

Changelog

Fixed

• Fix bugs in automatic updates of simulator configuration basis gates (#1109)
• Fix noise model basis_gates when constructing from device (#1108)
• Fixed normalization in MPS truncation (#1094)
• Fix condtional instructions using c_if not working for reg of size>=64 on BasicAer backend (#1089)

Changelog

Added

• Cmake: make conan optional (#999)

Fixed

• Fix bug with nested omp being applied incorrectly (#1055)

Changelog

Fixed

• Corrected qubits ordering in MPS::sample_measure_using_probabilities. (#1011)
• Fixed bug in MPS::apply_kraus (#1003)
• Fix Aer provider to return new backend instances with backends/get_backend. (#1006)
• Fix bug in unsupported instructions error message (#1005)

Changelog

Deprecated

• Add support for phase, sqrt(X), and delay gates to simulators (#951)

Added

• Fix fusion thresholds and defaults (#990)
• Add missing standard gate basis gates (#989)
• Move AVX2 logic into Transformer class and enable SIMD on Unitary, DensityMatrix, SuperOp (#961)
• MPS: Apply kraus (#915)
• Add support for phase, sqrt(X), and delay gates to simulators (#951)
• MPS: Support snapshot_density_matrix (#948)
• Add support for rotation gates to noise model and simulators (#914)
• Add custom Vector class (#932)
• Add qobj header global phase support (#931)
• Kraus noise gate fusion method (#927)

Removed

• Drop support for Python 3.5 (#917)

Fixed

• Fix snapshots being copied rather than moved (#971)
• Add available memory checks for Statevector and Unitary simulators (#969)
• Make controller_wrapper functions functors (#945)
• fix a bug in thread management tests (#918)
• Fix evaluation y expectation (#898)
• Fix bug in StatevectorSimulator preventing AVX2, GPU, and single-precision simulations (#872)

Changelog

Fixed

• [Stable] Fix bug in StatevectorSimulator preventing AVX2, GPU, and single-precision simulations (#872) (#873)

Changelog

Added

• Add gate fusion to StatevectorSimulator and UnitarySimulator (#861)
• MPS: Improve performance of sample_measure (#808)
• Add BLAS_LIB_PATH as ENV var (#822)
• Add SIMD (AVX) extension for QubitVector (#684)
• Adding Delay, ShiftPhase, and SetPhase instruction handling to pulse simulator (#813)
• Cache ODE RHS params (#814)
• Improve integration and performance of matrix class and matrix based simulators (#801)
• MPS: Improve performance of Pauli expectation value (#812)
• optimize expectation value by considering pairwise operations (#806)
• Introduce abstraction of DE methods (#784)
• Improve performance of average snapshots (#807)
• Remove unnecessary copy of ExperimentResult objects (#796)
• Improve performance of pybind11 result conversion (#799)
• Introducing approximation into the MPS simulation method (#475)
• Add move semantics to matrix class (#794)
• Allow for suppressing warnings in NoiseModel.from_backend() (#792)
• Add subsystem density matrix snapshots to qasm simulator (#718)
• Select CUDA architecture(s) through Cmake option (#783)
• Add Conan package manager to the buildsystem (#648)
• MPS: Optimize swaps (#665)
• Optimize Pauli expectation value performance (#737)
• Improve efficiency of checking measurement sampling conditions (#730)
• Improve gate fusion (#667)

Changed

• Remove "extended_stabilizer" from automatic simulation methods. (#699)
• Disable jsonschema validation by default (#688)

Fixed

• Fix error when passed an expval snapshot with zero coefficient (#826)
• Fix channel value bug and revamp pulse sim testing (#811)
• MPS: Fixed bug related to floating-point precision on Windows (#809)
• Fix bug in DensityMatrixThrust apply_y (#771)
• Fix required memory checks for QasmSimulator with custom method (#763)
• Fixed cz gate of DensityMatrixThrust #754 (#760)
• Fix bugs in density matrix simulation method for diagonal gates and conditionals (#767)
• Density matrix snapshot not returned as Numpy array (#712)
• Fix Hamiltonian parsing edge cases in pulse simulator (#752)
• Fix stall of pulse simulator execution as described in issue #726 (#734)
• Fixing subsystem_list handling in pulse simulator (#722)
• Fix number of parallel shots for statevector and unitary sims (#725)
• Fix memory leak in gpu simulator (#717)
• Fix tolerance when checking if diagonal is unitary (#707)
• Fix depol error param for device noise model with depol + relaxation error (#704)
• adding cy to stabilizer (#701)
• Fix ReduceBarriers to be applied before truncation (#693)

Changelog

Fixed

• Fix required memory checks for QasmSimulator with custom method (#763)
• Fixed cz gate of DensityMatrixThrust #754 (#760)
• Fix bugs in density matrix simulation method for diagonal gates and conditionals (#767)
• Fix number of parallel shots for statevector and unitary sims (#725)
• Fix memory leak in gpu simulator (#717)

Changelog

Changed

• Remove "extended_stabilizer" from automatic simulation methods. (#699)
• Disable jsonschema validation by default (#688)

Fixed

• adding cy to stabilizer (#701)
• Fix ReduceBarriers to be applied before truncation (#693)

Changelog

Fixed

• Add support for terra diagonal gate (#683)
• Add support for parameterized qobj (#485)
• Added postfix for linux on Raspberry Pi (#651)
• Handle numpy array inputs from qobj (#656)

Changelog

Added

• Add terra to the Aer requirements list (#593)
• Find muparserx system library before using distributed one (#621)
• MPS: Support multi-qubit apply matrix (#634)
• MPS: Added thresholds to loops that use parallelization (#638)
• MPS: Improvements to apply_matrix (#641)

Changed

• Bump minimum required version of numpy (#594)
• Replace PyDataMem_NEW_ZEROED to PyDataMem_NEW (#578)

Fixed

• Fixed bug in QuantumError compose method when composing Kraus with non-Kraus errors (#605).
• Fix TBB compilation (#598)
• Fixed MPS expectation value when qubits are not given in ascending order (#603)
• Fix bug in QuantumError compose method (#605)
• Fix gate fusion (#606)
• Removes static numpy initialization strategy for the Pulse simulator (#609)
• Fix QuantumError sometimes casting probabilities to complex (#640)

CHANGELOG

Added

• Added NoiseModel.from_backend for building a basic device noise model for an IBMQ backend (#569)
• Added multi-GPU enabled simulation methods to the QasmSimulator, StatevectorSimulator, and UnitarySimulator. The qasm simulator has gpu version of the density matrix and statevector methods and can be accessed using "method": "density_matrix_gpu" or "method": "statevector_gpu" in backend_options. The statevector simulator gpu method can be accessed using "method": "statevector_gpu". The unitary simulator GPU method can be accessed using "method": "unitary_gpu". These backends use CUDA and require an NVidia GPU.(#544)
• Added PulseSimulator backend (#542)
• Added PulseSystemModel and HamiltonianModel classes to represent models to be used in PulseSimulator (#496, #493)
• Added duffing_model_generators to generate PulseSystemModel objects from a list of parameters (#516)
• Migrated ODE function solver to C++ (#442, #350)
• Added high level pulse simulator tests (#379)
• CMake BLAS_LIB_PATH flag to set path to look for BLAS lib (#543)

Changed

• Changed the structure of the src directory to organise simulator source code. Simulator controller headers were moved to src/controllers and simulator method State headers are in src/simulators (#544)
• Moved the location of several functions (#568):
  • Moved contents of qiskit.provider.aer.noise.errors into the qiskit.providers.noise module
  • Moved contents of qiskit.provider.aer.noise.utils into the qiskit.provider.aer.utils module.
• Enabled optimization to aggregate consecutive gates in a circuit (fusion) by default (#579).

Deprecated

• Deprecated utils.qobj_utils functions (#568)
• Deprecated qiskit.providers.aer.noise.device.basic_device_noise_model. It is superseded by the NoiseModel.from_backend method (#569)

Removed

• Removed NoiseModel.as_dict, QuantumError.as_dict, ReadoutError.as_dict, and QuantumError.kron methods that were deprecated in 0.3 (#568).

Changelog

Added

• Added support for probabilities snapshot and Pauli expectation value snapshot in the stabilizer simulator (#423)

Fixed

• MPS simulation method: fixed computation of snapshot_probabilities on subsets of the qubits, in any ordering (#424)
• Fixes bug where cu3 was being applied as cu1 for unitary_simulator (#483)

Changelog

Added

• Added controlled gates (cu1, cu2, cu3) to simulator basis_gates (#417)
• Added multi-controlled gates (mcx, mcy, mcz, mcu1, mcu2, mcu3) to simulator basis gates (#417)
• Added gate definitions to simulator backend configurations (#417)

Changed

• Improved pershot snapshot data container performance (#405)
• Add basic linear algebra functions for numeric STL classes (#406)
• Improved average snapshot data container performance (#407)

CHANGELOG

Fixed

• Fix sdist to always attempt to build (#401)

Changelog

Added

• Added tests for the Fredkin gate (#357)
• Added tests for the cu1 gate (#360)
• Added tests for statevector and stabilizer snapshots (#355)
• Added tests for density matrix snapshot (#374)
• Added tests for probabilities snapshot (#380)
• Added support for reset() in MPS simulation method (#393)
• Added tests for matrix and Pauli expectation value snapshot (#386)

Changed

• Changes signature of SnapshotExpectationValue extension and the way qubit position parameters are parsed in expectation_value_matrix qobj instructions (#386)
• Change signature of SnapshotProbabilities extension (#380)
• Change signature of SnapshotDensityMatrix extension (#374)
• Stabilizer snapshot returns stabilizer instead of full Clifford table (#355)
• Signature of SnapshotStatevector and SnapshotStabilizer (#355)
• Changed all names from tensor_network_state to matrix_product_state (#356)
• Update device noise model to consume asymmetric readout errors from backends (#354)
• Update device noise model to use gate_length (#352)
• Refactoring code and introducing floating point comparison func (#338)

Changelog

Added

• New simulation method for qasm simulator: tensor_network (#56)
• Added superop qobj instruction and superoperator matrix utils (#289)
• Added support for conditional unitary, kraus, superop qobj instructions (#291)
• Add "validation_threshold" config parameter to Aer backends (#290)
• Added support for apply_measure in tensor_network_state. Also changed sample_measure to use apply_measure (#299)
• Added density matrix simulation method to QasmSimulator (#295, #253)
• Adds delay measure circuit optimization (#317)
• Added sampling for sampling with readout-errors (#222)
• Added support of single precision for statevector and density matrix simulation (#286, #315)
• Noise model inserter module (#239)

Changed

• Added density matrix method to automatic QasmSimulator methods (#316)

Fixed

• Bug in handling parallelization in matrix_product_state.cpp (PR #292)
• Added support for multiplication by coeff in tensor_network_state expectation value snapshots (PR #294)
• Change name of qasm simulation method from tensor_network to matrix_product_state (#320)

Changelog

Fixed

• Bug in measure sampling conditional checking with conditional instructions (#280)

Changelog

Added

• Added multi-controlled phase gate to QubitVector and changed multi-controlled Z and multi-controlled u1 gates to use this method (# 258)
• Added optimized anti-diagonal single-qubit gates to QubitVector (# 258)

Changed

• Improve performance of matrix fusion circuit optimization and move fusion code out of QubitVector class and into Fusion optimization class (#255)

Removed

• Remove matrix_sequence Op type from Op class (#255)

Fixed

• Change maximum parameter for depolarizing_error to allow for error channel with no identity component. (#243)
• Fixed 2-qubit depolarizing-only error parameter calculation in basic_device_noise_model (#243)
• Set maximum workers to ThreadPoolExecutor in AerJob to limit thread creation (#259)

Changelog

Added

• Use seed_simulator from qobj (#210)

Fixed

• Fix memory error handling for huge circuits (#216)
• Fix equality expressions in Python code (#208)

Changelog

Added

• Add multiplexer gate (#192)
• Add remap_noise_model function to noise.utils (#181)
• Add __eq__ method to NoiseModel, QuantumError, ReadoutError (#181)
• Add support for labelled gates in noise models (#175).
• Add optimized mcx, mcy, mcz, mcu1, mcu2, mcu3, gates to QubitVector (#124)
• Add optimized controlled-swap gate to QubitVector (#142)
• Add gate-fusion optimization for QasmContoroller, which is enabled by setting fusion_enable=true (#136)
• Add better management of failed simulations (#167)
• Add qubits truncate optimization for unused qubits (#164)
• Add ability to disable depolarizing error on device noise model (#131)
• Add initialise simulator instruction to statevector_state (#117, #137)
• Add coupling maps to simulators (#93)
• Add circuit optimization framework (#83)
• Add benchmarking (#71, #177)
• Add wheels support for Debian-like distributions (#69)
• Add autoconfiguration of threads for qasm simulator (#61)
• Add Simulation method based on Stabilizer Rank Decompositions (#51)

Changed

• Add basis_gates kwarg to NoiseModel init (#175).
• Depreciated "initial_statevector" backend option for QasmSimulator and StatevectorSimulator (#185)
• Rename "chop_threshold" backend option to "zero_threshold" and change default value to 1e-10 (#185).
• Add an optional parameter to NoiseModel.as_dict() for returning dictionaries that can be serialized using the standard json library directly. (#165)
• Refactor thread management (#50)

Removed

Fixed

• Improve noise transformations (#162)
• Improve error reporting (#160)
• Improve efficiency of parallelization with max_memory_mb a new parameter of backend_opts (#61)
• Improve u1 performance in statevector (#123)
• Fix OpenMP clashing problems on MacOS for the Terra Addon (#46)

Changelog

Added

• Adds version information when using the standalone simulator (#36)
• Adds a Clifford stabilizer simulation method to the QasmSimulator (#13)
• Improve Circuit and NoiseModel instructions checking (#31)
• Add reset_error function to Noise models (#34)
• Improve error reporting at installation time (#29)
• Validate n_qubits before execution (#24)
• Add qobj method to AerJob (#19)

Removed

• Reference model tests removed from the codebase (#27)

Fixed

• Fix Contributing guide (#33)
• Fix an import in Terra integration tests (#33)
• Fix non-OpenMP builds (#19)
• Fix Windows packaging to include openblas.dll