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CHANGELOG.rst

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog.

Types of changes:

  • Added: for new features.
  • Changed: for changes in existing functionality.
  • Deprecated: for soon-to-be removed features.
  • Removed: for now removed features.
  • Fixed: for any bug fixes.
  • Security: in case of vulnerabilities.

UNRELEASED

Added

  • Implementation of the HHL algorithm supporting LinearSystemInput
  • Pluggable component Eigenvalues with variant EigQPE
  • Pluggable component Reciprocal with variants LookupRotation and LongDivision
  • Multiple-Controlled U1 and U3 operations mcu1 and mcu3
  • Pluggable component QFT derived from component IQFT
  • Summarize the tranpiled circuits at the DEBUG logging level.
  • QuantumInstance accepts basis_gates and coupling_map again.
  • Support to use cx gate for the entangement in RY and RYRZ variational form. (cz is the default choice.)

Removed

  • QuantumInstance does not take memory anymore.

Changed

  • Change the type of entanger_map used in FeatureMap and VariationalForm to list of list.

0.4.1 - 2019-01-09

Added

  • Optimizers now have most relevant options on constructor for ease of programming. Options may still be set via set_options.
  • Provider is now explicitly named and the named backend is created from that named provider. Backend being selected from the first of the internally known set of providers is deprecated.
  • Improve operation with Aer provider/backends.
  • Registration to Aqua of externally provided pluggable algorithms and components altered to setuptools entry point support for plugins. The prior registration mechanism has been removed.
  • A flag before_04 in the load_from_dict(file) method is added to support to load operator in the old format. We encourage to save the operator in the new format from now on.

0.4.0 - 2018-12-19

Added

  • Compatibility with Terra 0.7
  • Compatibility with Aer 0.1
  • Programmatic APIs for algorithms and components -- each component can now be instantiated and initialized via a single (non-emptY) constructot call
  • QuantumInstance API for algorithm/backend decoupling -- QuantumInstance encapsulates a backend and its settings
  • Updated documentation and Jupyter Notebooks illustrating the new programmatic APIs
  • Transparent parallelization for gradient-based optimizers
  • Multiple-Controlled-NOT (cnx) operation
  • Pluggable algorithmic component RandomDistribution
  • Concrete implementations of RandomDistribution: BernoulliDistribution, LogNormalDistribution, MultivariateDistribution, MultivariateNormalDistribution, MultivariateUniformDistribution, NormalDistribution, UniformDistribution, and UnivariateDistribution
  • Pluggable algorithmic component:
  • Concrete implementations of UncertaintyProblem: FixedIncomeExpectedValue, EuropeanCallExpectedValue, and EuropeanCallDelta
  • Amplitude Estimation algorithm
  • Qiskit Optimization: New Ising models for optimization problems exact cover, set packing, vertex cover, clique, and graph partition
  • Qiskit AI:
    • New feature maps extending the FeatureMap pluggable interface: PauliExpansion and PauliZExpansion
    • Training model serialization/deserialization mechanism
  • Qiskit Finance:
    • Amplitude estimation for Bernoulli random variable: illustration of amplitude estimation on a single qubit problem
    • Loading of multiple univariate and multivariate random distributions
    • European call option: expected value and delta (using univariate distributions)
    • Fixed income asset pricing: expected value (using multivariate distributions)

Changed

  • The pauli string in Operator class is aligned with Terra 0.7. Now the order of a n-qubit pauli string is q_{n-1}...q{0} Thus, the (de)serialier (save_to_dict and load_from_dict) in the Operator class are also changed to adopt the changes of Pauli class.

Removed

  • HartreeFock component of pluggable type ``InitialState` moved to Qiskit Chemistry
  • UCCSD component of pluggable type VariationalForm moved to Qiskit Chemistry

0.3.1 - 2018-11-29

Changed

  • Different backends might have different signatures for describing the job completion.

0.3.0 - 2018-10-05

Added

  • Updated for 0.6 Terra
  • Enhanced backend settings
  • Pluggable multiclass classifier extensions
    • AllPairs
    • OneAgainstAll
    • ErrorCorrectingCode
  • Pluggable Feature Maps for QSVM algos
  • Pluggable Variation Forms for QSVM.Variational
  • SPSA calibration and control variables all configurable
  • Step size configurable for optimizers with numerical approximation of the jacobian
  • Z2 Symmetry tapering
    • Operator
    • HartreeFock InitialState
    • UCCSD
  • UCCSD performance improvements
  • Remote device/simulator job auto-recovery
  • Algorithm concatenation: VQE->(I)QPE
  • Operator improvements
    • Subtraction
    • Negation
    • Scaling

0.2.0 - 2018-07-27

Added

  • Ising model for TSP.
  • add summarize circuits.
  • Relax max circuits for simulation.
  • Added qubit_tapering method.
  • multiclass svm (one against all).
  • Allow dynamic loading preferences package.module.

Changed

  • Changed name from acqua to aqua.
  • Move QAOA's variational form to under the algorithm implementation directory.
  • Factor out the QAOA variational form.

Fixed

  • Operator will crash if the backend is None.
  • Fix/max num circuits.
  • fix grover for cases that don't need ancillary qubits.
  • Fixed validation error for string of numbers.
  • fix link to ai and opt notebooks.

0.1.2 - 2018-07-12

Added

  • UI Preferences Page including proxies urls, provider, verify.
  • Add help menu with link to documentation.
  • Add num_iterations param to grover.
  • Graph partition ising model added.
  • F2 finite field functions and find_Z2_symmetries function.
  • Added packages preferences array for client custom pluggable packages.

Changed

  • Clean up use_basis_gates options.
  • Change Qiskit registering for Qiskit 0.5.5.

Fixed

  • GUI - Windows: new line appears when text view dismissed.
  • Update test_grover to account for cases where the groundtruth info is missing.
  • Qconfig discovery - Fix permission denied error on list folders.
  • UI Fix Popup cut/copy/paste/select all behavior in mac/windows/linux.
  • Fix typo grouped paulis.
  • Fix numpy argmax usage on potentially complex state vector.
  • Fix/use list for paulis and update helper function of ising model.

0.1.1 - 2018-06-13

Changed

  • Changed short and long descriptions in setup.py.

0.1.0 - 2018-06-13

Changed

  • Changed package name to dashes in setup.py.
  • Updated qiskit minimum version in setup.py.
  • Fixed links in readme.me.