Entanglement fidelity of a quantum channel #4158
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
95-martin-orion
requested changes
Jun 3, 2021
| for k in protocols.channel(operation): | ||
| f += np.abs(np.trace(k)) ** 2 | ||
| n_qubits = protocols.num_qubits(operation) | ||
| return float(f / 4 ** n_qubits) |
There was a problem hiding this comment.
Could you add a test for an operation with more than one qubit?
There was a problem hiding this comment.
Good point. Added 2- and 3-qubit test cases for unitary and depolarizing channels.
95-martin-orion
approved these changes
Jun 3, 2021
rht
pushed a commit
to rht/Cirq
that referenced
this pull request
May 1, 2023
harry-phasecraft
pushed a commit
to PhaseCraft/Cirq
that referenced
this pull request
Oct 31, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This computes entanglement fidelity of a channel directly from its Kraus representation.