Release 0.34.0

Bug fixes 🐛

• The kwargs job_tags and session_id are passed to the correct arguments in the circuit_runner device so that they will be used in the Qiskit backend; these were previously ignored. (#358)

• The generate_samples method for the IBMQSamplerDevice is updated to get counts from the nearest probability distribution rather than the quasi-distribution (which may contain negative probabilities and therefore raise errors). (#357)

• The generate_samples method for the IBMQSamplerDevice now avoids raising an indexing error when some states are not populated, and labels states according to the Pennylane convention instead of Qiskit convention. (#357)

Contributors ✍️

This release contains contributions from (in alphabetical order):

Lillian Frederiksen, Francesco Scala

Release 0.33.1

Improvements 🛠

• Stop using the now-deprecated tape.is_sampled property. (#348)

Bug fixes 🐛

• Update conversion of PennyLane to Qiskit operators to accommodate the addition of Singleton classes in the newest version of Qiskit. (#347)

Contributors ✍️

This release contains contributions from (in alphabetical order):

Lillian Frederiksen, Matthew Silverman

Release 0.33.0

Improvements 🛠

• Logic updated to support Aer V2 device naming conventions. (#343)

Breaking changes 💔

• The old return type system has been removed. (#331)

Contributors ✍️

This release contains contributions from (in alphabetical order):

Mudit Pandey, Matthew Silverman

Release 0.32.0

Improvements 🛠

• Added support for qml.StatePrep as a state preparation operation. (#326)

Breaking changes 💔

• Support for Python 3.8 has been removed. (#328)

Contributors ✍️

This release contains contributions from (in alphabetical order):

Mudit Pandey,
Jay Soni.

Release 0.31.0

New features since last release

• Added a RemoteDevice (PennyLane device name: qiskit.remote) that accepts a backend instance directly. (#304)

Breaking changes

• The vqe_runner has been removed, as the Qiskit Runtime VQE program has been retired.
  (#313)

Bug fixes

• The list of supported gates is replaced with pennylane.ops._qubit__ops__ so that the CZ gate is included.
  (#305)

Contributors

This release contains contributions from (in alphabetical order):

Matthew Silverman, Frederik Wilde, Etienne Wodey (Alpine Quantum Technologies GmbH)

Release 0.30.1

Breaking changes

• vqe_runner has been updated to use IBMQ's VQE program. The first argument, program_id, has
  now been removed. The upload_vqe_runner and delete_vqe_runner functions have also been removed.
  (#298)

Improvements

• Updated many small things across the plugin to match re-works and deprecations in qiskit. The plugin
  can still be used in the same way as before. However, we suggest you authenticate with
  qiskit_ibm_provider.IBMProvider instead of qiskit.IBMQ from now on, as the latter is deprecated.
  (#301)

Contributors

This release contains contributions from (in alphabetical order):

Matthew Silverman

Release 0.30.0

Breaking changes

• The new return system from PennyLane is adopted in the plugin as well.
  (#281)

Contributors

This release contains contributions from (in alphabetical order):

Romain Moyard.

Release 0.29.0

Breaking changes

• .inv is replaced by qml.adjoint in PennyLane 0.30.0 and therefore the plugin is adapted as well.
  (#260)

• The minimum required version of PennyLane is bumped to 0.28. The current plugin
  does not work with PennyLane v0.27.

Bug fixes

• The number of executions of the device is now correct.
  (#259)

Contributors

This release contains contributions from (in alphabetical order):

Christina Lee
Romain Moyard

Release 0.28.0

Breaking changes

• Changed the signature of the QubitDevice.statistics method from

  def statistics(self, observables, shot_range=None, bin_size=None, circuit=None):

  to

  def statistics(self, circuit: QuantumScript, shot_range=None, bin_size=None):

  #3421

Improvements

• Adds testing for Python 3.11. (#237)

Bug fixes

• Do not try to connect with an IBMQX token if it is falsy. (#234)

Contributors

This release contains contributions from (in alphabetical order):

Christina Lee, Albert Mitjans-Coma and Matthew Silverman

Release 0.27.0

New features since last release

• Add support for the ISWAP operation. (#229)

Bug fixes

• Fix Cobyla success bool for VQE runtime. (#231)

Contributors

This release contains contributions from (in alphabetical order):

Romain Moyard, Matthew Silverman