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### Expected behavior
I want to use the density to in QNN, and learn the parameters of the QNN. The main code as follow:
 in PennyLane led to failed tests in Catalyst. The error messages using PennyLane `0.31.0-dev`:
```console
wa…
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Many symbols that are effectively _exported_ by pulser are _not discovered_ by pyright.
This is the case for `pulser.Sequence` or `pulser.Register` for instance.
I suspected that other static …
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### Environment
- **Covalent version**: 0.33.0
- **Python version**: 3.8.5
- **Operating system**: MacOS Big Sur 11.6
### What is happening?
Some optimization routines are not actually progres…
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### Feature details
Make merge_amplitude_embedding work with batches.
When feeding 2D tensors to merge_amplitude_embedding, it performs a Kronecker product under the hood, also expanding the batch…
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The **Benchmark** section of README.md shows a performance comparison between QAOA.jl and PennyLane. Although the data is in the assets folder, having the PennyLane script would be essential for direc…
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Thanks you for you make this code, is very good for me understanding.
Here:
https://pennylane.ai/qml/demos/tutorial_quantum_transfer_learning.html
```
@qml.qnode(dev, interface="torch")
def …
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## Description
The choice of the feature map is perhaps the most important choice a QML engineer can make, as it will directly dictate the size of the circuit required. There are four common encoding…
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Changing `@qjit` to `@qjit(keep_intermediate=True)` in some tests leads to memory corruptions (seen as mismatched test results).
This behavior was observed in [test_adjoint.py](https://github.com/P…
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### Expected behavior
When using the device `default.mixed`, a QNode defined on the `torch` interface returning using the `qml.state()` function should return a `torch` tensor.
### Actual behav…