Pablo Antonio Moreno Casares

Sharding the computation between GPUs

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Add sharding following https://jax.readthedocs.io/en/latest/notebooks/Distributed_arrays_and_automatic_parallelization.html

Should we delete the unused branches @jackbaker1001 ?

[Bugfix] `qml.BasisRotation` is not jax compatible

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### Before submitting Please complete the following checklist when submitting a PR: - [x] All new features must include a unit test. If you've fixed a bug or added code...

[BUG] Inconsistent behavior between lighning.qubit and default.qubit

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### Expected behavior The following code ``` dev1 = qml.device("lightning.qubit", wires=1) @qml.qnode(dev1) def circuit2(phi1, phi2): qml.RX(phi1, wires=0) qml.RY(phi2, wires=0) return qml.expval(qml.PauliZ(0)) phi1 = np.array([0.54]) phi2 = np.array([0.12]) circuit2(phi1, phi2) ```...

Implemented sparse fragments

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### Before submitting Please complete the following checklist when submitting a PR: - [ ] All new features must include a unit test. If you've fixed a bug or added...

Convergence Info for Trotter

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### Before submitting Please complete the following checklist when submitting a PR: - [ ] All new features must include a unit test. If you've fixed a bug or added...

[BUG] Trotter error estimate should add up expectation values of nested commutators, not states

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### Expected behavior In Trotter error estimation we are currently adding states instead of expectation values. The intended implementation should be ``` for commutator in commutators: new_expected_value += _compute_expected value(commutator,...