catalyst

catalyst copied to clipboard

[BUG] When using transforms with AutoGraph, there is unexpected behaviour where transforms may not be properly applied.

2

For example, consider the following: ```python @qml.transform def my_quantum_transform(tape): new_operations = [] for op in tape: if op.name == "RX": if op.parameters[0] < 0: new_operations.append(qml.RY(-op.parameters[0], wires=op.wires)) else: new_operations.append(op) new_tape =...

josh146

[Frontend][MLIR] Check (co)tangent arguments of jvp/vjp

2

Ensure that (co)tangent arguments of jvp/vjp contain floats. [sc-48792]

sergei-mironov

Gradient dialect removes `qnode` attribute from quantum functions when creating helper functions.

1

* *Expected behavior:* The attribute remains through the lowering of gradient and quantum dialect up until LLVM-IR (in which case we might wish to annotate it with some metadata). *...

erick-xanadu

Instead of having two pipelines, (one for async and one for non-async), we could have one single pipeline by predicating the compiler passes. For example: ```python A_PIPELINE = ( "A_PIPELINE_NAME",...

erick-xanadu

Print function ordering

9

The print function should not be re-ordered. Example: ```python import pennylane as qml from catalyst import debug, grad, measure, qjit @qml.qnode(qml.device("lightning.qubit", wires=20)) def f(x): qml.RX(x, wires=[0]) debug.print("hello") return qml.state() @qjit(keep_intermediate=True,...

erick-xanadu

[Dynamic shapes] Raise an exception if shape is not an integer

1

* *Expected behavior:* Shapes are integral values. Therefore an error should be raised if non-integral values are used. * *Actual behavior:* Silently a rounding function (possibly floor) is used. *...

erick-xanadu

[MLIR][Frontend] Differentiating `qml.QubitUnitary` results in core dump.

5

* *Expected behavior:* Attempting to differentiate a non-differentiable gate (like `qml.QubitUnitary`) should ideally raise an error instead of a core dump. * *Actual behavior:* A segfault during the enzyme passes....

erick-xanadu

This is a potential issue which was discovered during the Jax dynamic API development. In the two-stage quantum tracing, we do the type unification of all the conditional branches _after_...

sergei-mironov

Move `get_c_interface` into toml files.

2

Soon after specifying toml files, we can have a the C interface also defined in the toml file. It makes sense to have all this information in one place.

erick-xanadu

#### Issue description * *Expected behavior:* QubitUnitary for gates with more than 2 qubits is not differentiable using Enzyme. This means that programs that transform gates to QubitUnitary cannot be...

erick-xanadu