18 citations · 21 across the 5 of their papers we have counts for
5 papers
Topics in Estimation of Quantum Channels
Caleb J. O'Loan
A quantum channel is a mapping which sends density matrices to density matrices. The estimation of quantum channels is of great importance to the field of quantum information. In t…
Iterative phase estimation
Caleb J O'Loan
We give an iterative algorithm for phase estimation of a parameter theta, which is within a logarithmic factor of the Heisenberg limit. Unlike other methods, we do not need any ent…
Analysis of SM quantum information
Caleb J O'Loan
Morozova and Chentsov (Morozova and Chentsov 90) studied Riemannian metrics on the set of probability measures. They showed that, up to a constant factor, the Fisher information is…
Estimation of n non-identical unitary channels
Caleb J O'Loan
We investigate the simultaneous estimation of not necessarily identical unitary channels using multi-partite entanglement. We examine whether it is possible for the rate at whi…
Analysis of a convenient information bound for general quantum channels
Caleb J. O'Loan
Open questions from Sarovar and Milburn (2006 J.Phys. A: Math. Gen. 39 8487) are answered. Sarovar and Milburn derived a convenient upper bound for the Fisher information of a one-…