Pennylane-lightning

Bug fixes

* The PennyLane-Lightning binaries are now built with NumPy 1.19.5, to avoid ABI compatibility issues with the latest NumPy 1.20 release. See [the NumPy release notes](https://numpy.org/doc/stable/release/1.20.0-notes.html#size-of-np-ndarray-and-np-void-changed) for more details. [(97)](https://github.com/PennyLaneAI/pennylane-lightning/pull/97)

Contributors

This release contains contributions from (in alphabetical order):

Josh Izaac, Antal Száva

Improvements

* For compatibility with PennyLane v0.15, the `analytic` keyword argument has been removed. Statistics can still be computed analytically by setting `shots=None`. [(93)](https://github.com/PennyLaneAI/pennylane-lightning/pull/93)

* Inverse gates are now supported. [(89)](https://github.com/PennyLaneAI/pennylane-lightning/pull/89)

* Add new lightweight backend with performance improvements. [(57)](https://github.com/PennyLaneAI/pennylane-lightning/pull/57)

* Remove the previous Eigen-based backend. [(67)](https://github.com/PennyLaneAI/pennylane-lightning/pull/67)

Bug fixes

* Re-add dispatch table after fixing static initialization order issue. [(68)](https://github.com/PennyLaneAI/pennylane-lightning/pull/68)

Contributors

This release contains contributions from (in alphabetical order):

Thomas Bromley, Theodor Isacsson, Christina Lee, Thomas Loke, Antal Száva.

Bug fixes

* Fixes a bug where the `QNode` would swap `LightningQubit` to `DefaultQubitAutograd` on device execution due to the inherited
`passthru_devices` entry of the `capabilities` dictionary. [(61)](https://github.com/PennyLaneAI/pennylane-lightning/pull/61)

Contributors

This release contains contributions from (in alphabetical order):

Antal Száva

Improvements

* Extends support from 16 qubits to 50 qubits. [(52)](https://github.com/PennyLaneAI/pennylane-lightning/pull/52)

Bug fixes

* Updates applying basis state preparations to correspond to the changes in `DefaultQubit`. [(55)](https://github.com/PennyLaneAI/pennylane-lightning/pull/55)

Contributors

This release contains contributions from (in alphabetical order):

Thomas Loke, Tom Bromley, Josh Izaac, Antal Száva

Bug fixes

* Updates capabilities dictionary to be compatible with core PennyLane [(45)](https://github.com/PennyLaneAI/pennylane-lightning/pull/45)

* Fix install of Eigen for CI wheel building [(44)](https://github.com/PennyLaneAI/pennylane-lightning/pull/44)

Contributors

This release contains contributions from (in alphabetical order):

Tom Bromley, Josh Izaac, Antal Száva

Initial release.

Contributors:

Tom Bromley, Josh Izaac, Nathan Killoran, Antal Száva