Share Your Experience: Take the 2024 Developer Survey

# Tag Info

## Hot answers tagged metrics

Accepted

### Does the symmetric logarithmic derivative operator have a geometric interpretation?

First, the classical correspondence, explaining why the SLD should be present. The Fisher information is the expectation value of the score, where the score is the logarithmic derivative of the ...
• 4,324
Accepted

### What is the connection between Bures metric and (finite) Bures distance?

The Bures metric is the limit of the Bures distance for two infinitesimally close density matrices $\rho$ and $\rho+d\rho$. The Bures distance however, is not unique. It depends on the space on ...
• 2,575

### Does the symmetric logarithmic derivative operator have a geometric interpretation?

Although, the Bures metric, the Fisher tensor and the symmetric logarithmic derivative appear mainly in quantum estimation theory, and even though the original discovery by Helstrom was in this ...
• 2,575

### Is there a straightforward way to calculate the quantum volume for simple systems?

I believe the calculation steps are quite complex to give a simple formula or even to follow it by hand. Maybe this medium article and the cited paper gives you a better general understanding. As you ...
• 508
1 vote

### How to go from finite to infinitesimal form of the Fubini-Study metric?

Quite amusingly, I just realised pretty much this exact question was previously asked on math.SE, and an answer was given there a few years ago... by myself. I completely forgot. I'll copy-paste the ...
• 25.3k
1 vote

### Is there a straightforward way to calculate the quantum volume for simple systems?

To put in simple words, the quantum volume tells a maximal dimension of state space (Hilbert space) you can simulate on a quantum computer sucessfully. For example, quantum volume 64 means that you ...
• 14.5k

Only top scored, non community-wiki answers of a minimum length are eligible