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#### Issue description
The following code does not work (NB: the `-1` factor in `ops`).
```python
ops = [-1 * qml.Z(0) @ qml.Z(1)]
coeffs = [1.]
reg = qml.registers({"physical": 2, "prep": …
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One might choose from a set of different functions:
- theta
- errorfunction
- gaussian
And the parameter would be the duration. Features could be:
- Switching on/off
- Annealing
- A/C field o…
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We need to make sure that building hamiltonians using Rauk and PPP dictionaries is correct
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Currently, sampling from a model always prints warnings for numerical errors and info statements on the initial step size, even with the option `verbose=false`. This can really fill up the REPL, espe…
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Dear YangZhong:
I get an Error when run the training process, there's full error mesage below:
```bash
Validation sanity check: 0%| …
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I'm more than happy to improve the spec and/or the [`avogadro-cclib` plugin](https://github.com/OpenChemistry/avogadro-cclib)
One thing I note, is that the metadata is really inconsis…
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The following code, which uses the `append_gate` transformation present within `qml.optimize.AdaptiveOptimizer`, works fine with `default.qubit`:
```python
import pennylane as qml
from pennylane.…
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I was thinking that we do not provide any easy to use tool to retrieve the PDF of a model in Flamedisx.
As is, it seems really difficult (or is it even possible?) to retrieve the PDF of a model. S…
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[You posted on Reddit](https://www.reddit.com/r/MachineLearning/comments/l4rnfv/p_why_are_stacked_autoencoders_still_a_thing/).
I think this is very cool.
In the Reddit post you ask if you misse…
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### What is the expected behavior?
Dear Qiskit
In the current implementation of the vibrational UCC ansatz to compute bosonic energy spectra in quantum chemistry (Ollitrault, et. al, https:/…