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7 votes
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 ...
Quantum Mechanic's user avatar
4 votes
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 ...
David Bar Moshe's user avatar
2 votes

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 ...
David Bar Moshe's user avatar
2 votes

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 ...
26118in's user avatar
  • 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 ...
glS's user avatar
  • 25.6k
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 ...
Martin Vesely's user avatar

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