Quantum Fisher Information: Variational principle and simple iterative algorithm for its efficient computation

2013/12/04 by Katarzyna Macieszczak, Macieszczak, Katarzyna · 2 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Advanced Thermodynamics and Statistical Mechanics #Quantum Mechanics and Applications

paper · pdf · doi:10.48550/arxiv.1312.1356

Abstract

We derive a new variational principle for the quantum Fisher information leading to a simple iterative alternating algorithm, the convergence of which is proved. The case of a fixed measurement, i.e. the classical Fisher information, is also discussed.

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