Physics – Quantum Physics
Scientific paper
1998-10-05
J.Geom.Phys. 31 (1999) 16-24
Physics
Quantum Physics
Latex, 9 pages
Scientific paper
10.1016/S0393-0440(98)00068-0
The Riemannian Bures metric on the space of (normalized) complex positive matrices is used for parameter estimation of mixed quantum states based on repeated measurements just as the Fisher information in classical statistics. It appears also in the concept of purifications of mixed states in quantum physics. Here we determine its scalar curvature and Ricci tensor and prove a lower bound for the curvature on the submanifold of trace one matrices. This bound is achieved for the maximally mixed state, a further hint for the quantum statistical meaning of the scalar curvature.
No associations
LandOfFree
The Scalar Curvature of the Bures Metric on the Space of Density Matrices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Scalar Curvature of the Bures Metric on the Space of Density Matrices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Scalar Curvature of the Bures Metric on the Space of Density Matrices will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-639105