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CHANGELOG.md

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Release 0.15.0

New features

Improvements

Bug fixes

Documentation

Contributors

This release contains contributions from (in alphabetical order):

Release 0.14.0

New features

  • Added support for custom simulator objects for use with the Floq service. (#51)

Contributors

This release contains contributions from (in alphabetical order):

Chase Roberts

Release 0.13.0

Improvements

  • Added support for iSWAP and CPhase gate operations. (#45)

Bug fixes

  • Removed import of qsimcirq from __init__.py, allowing other devices in this plugin to work without qsimcirq being installed. (#46)

Contributors

This release contains contributions from (in alphabetical order):

Theodor Isacsson

Release 0.12.1

New features since last release

  • PennyLane integration with the qsim circuit simulator package is now available. (#36).

    The new devices include:

    • cirq.qsim, a Schrödinger full state-vector simulator

    • cirq.qsimh, a hybrid Schrödinger-Feynman simulator. This simulator cuts the qubit lattice into two parts; each part is individually simulated using qsim, with Feynman-style path summation used to return the final result. Compared to full state-vector simulation, qsimh reduces memory requirements, at the expense of an increased runtime.

    After installing the qsimcirq package, the qsim and qsimh devices can be invoked via the names "cirq.qsim" and "cirq.qsimh" respectively, e.g.,

    dev = qml.device("cirq.qsimh", qsimh_options=qsimh_options, wires=3)

    These devices can then be used for the evaluation of QNodes within PennyLane. For more details, see the PennyLane qsim documentation

Contributors

This release contains contributions from (in alphabetical order):

Theodor Isacsson, Nathan Killoran, Josh Izaac

Release 0.12.0

New features since last release

  • Devices from Cirq's Pasqal submodule are now available for use. (#40).

    A simulator device compatible with Pasqal's neutral-atom model can be invoked via the name "cirq.pasqal", e.g.,

    dev = qml.device("cirq.pasqal", control_radius=1.0, wires=3)

Contributors

This release contains contributions from (in alphabetical order):

Nathan Killoran, Josh Izaac

Release 0.11.0

New features

  • Made plugin device compatible with new PennyLane wire management. (#37) (#42)

    One can now specify any string or number as a custom wire label, and use these labels to address subsystems on the device:

    dev = qml.device('cirq.simulator', wires=['q1', 'ancilla', 0, 1])

def circuit():
  qml.Hadamard(wires='q1')
  qml.CNOT(wires=[1, 'ancilla'])
  ...

Contributors

This release contains contributions from (in alphabetical order):

Josh Izaac, Nathan Killoran, Maria Schuld

Release 0.9.1

Improvements

Contributors

This release contains contributions from (in alphabetical order):

Release 0.9.0

New features since last release

  • Added a new mixedsimulator class to Cirq, which uses Cirq's DensityMatrixSimulator as a backend. #27

Documentation

  • Redesigned the documentation to be consistent with other plugins. #25

Bug fixes

  • Renamed probability to analytic_probability to support new changes in PennyLane. #24

Contributors

This release contains contributions from (in alphabetical order):

Theodor Isacsson, Nathan Killoran, Maria Schuld, Antal Száva

Release 0.8.0

Improvements

  • Ported the CirqDevice class to use the new QubitDevice base class, enabling the use of tensor observables. #19

  • Added support for inverse operations by defining the .inv() method of the CirqOperation class which uses the cirq.inverse function. #15

Bug fixes

  • Replaced depreceated Cirq commands. #19

  • Fix a minor bug introduced into the test suite by the release of Cirq 0.7.0. #18

  • Fix bugs introduced into the test suite by the release of Cirq 0.6.0. #13

Contributors

This release contains contributions from (in alphabetical order):

Johannes Jakob Meyer, Antal Száva

Release 0.1.0

Initial public release.

Contributors

This release contains contributions from:

Johannes Jakob Meyer