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CHANGELOG

Upcoming

Fixed

  • Make sure table gets printed if the flag is passed to print the terminal via the CLI examples (@inmzhang)
  • Fixed compilation errors, due to a breaking API change (since v0.5.0), in the benchmark (@inmzhang)

[0.5.1] - 2024-01-04

Performance Improvements

  • Measurement:
    • Improved performance of measurement by almost 50% in certain cases. Rayon will no longer splitting the iterator when the number of qubits is low (i.e., when # of qubits < 16).
    • Improved performance by removing superfluous instructions. Replaced modulus and squaring with direct computation for efficiency.

Code Refactoring

  • Streamlined the implementation of measure_qubit by utilizing the take iterator.

Fixed

  • Fixed spynoza examples to align with API changes introduced in v0.5.0.
  • Resolved an issue with a configuration test.

Other Changes

  • Update clap to 4.4.13
  • Update pyo3 to 0.20.2

[0.5.0] - 2023-12-31

Breaking Changes

  • Updated Gate Enum:
    • The Gate enum has undergone breaking changes for improved usability and clarity:
      • Removed tuple parameters from SWAP gate; it now takes two separate usize parameters.
      • Removed tuple parameters from U gate; it now takes three separate Float parameters.
      • Added a new gate: BitFlipNoise(Float) for simulating a bit flip based on the provided probability.

New Features

  • Controlled Hadamard Gate:

    • Addition of the controlled Hadamard gate for enhanced quantum circuit design.

  • Controlled Rz Gate:

    • Addition of the controlled Rz gate to broaden the range of available quantum gates.

  • Controlled U Gate:

    • Addition of the controlled U gate, allowing controlled application of a general single-qubit rotation.

  • Expectation Value Functions:

    • xyz_expectation_value:
      • New function allowing computation of expectation value for any of the operators X, Y, Z.
    • qubit_expectation_value:
      • Specialized function, for improved performance, to compute the expectation value of Z in the state.

Other Changes

  • Improved Documentation:
    • Enhanced documentation for new features and functions to assist users in integrating them into their projects.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Notes for Developers

  • Developers should be aware that breaking changes have been introduced to the Gate enum in this release. Please review and update your code accordingly. Breaking changes will not result in a major version increment until v1.0.0.

0.4.0

  • The default number of threads is now determined using std::thread::available_parallelism in lieu of using num_cpus.
  • once_cell has become a part of the standard library since Rust 1.70.0 so usage of OnceCell has now been replaced with OnceLock.

0.3.0

  • Add example for sampling
  • Parallelize sampling and add sampling tests
  • to_table() now returns a String in lieu of just printing the table
  • Provide improved examples for python interface users
  • Update dependencies to latest available releases
  • Update python bindings to reflect latest changes/features
  • Add code coverage to CI pipeline and add codecov badge to README
  • Add instructions for building on macOS
  • Add support for classical control
  • Add support to convert a subset of OpenQASM 2.0 programs into QuantumCircuit
  • Add inverse of QuantumCircuit via the inverse() method
  • Improve performance of measurement using iterators and rayon
  • Add support for Gate inverses
  • Improve performance of the SWAP gate
  • Add support for applying Unitaries to the state vector
  • Add single qubit measurement
  • Fix bug in U gate @nfwvogt
  • Add support for parallel execution
  • Move benchmarks to separate repository