32 citations · 136 across the 21 of their papers we have counts for
5 papers · 2 filters
Complementarity in quantum systems
Denes Petz
Reduction of a state of a quantum system to a subsystem gives partial quantum information about the true state of the total system. Two subalgebras A1 and A2 of B(H) are called com…
Point Estimation of States of Finite Quantum Systems
D. Petz, K. M. Hangos, A. Magyar
The estimation of the density matrix of a -level quantum system is studied when the parametrization is given by the real and imaginary part of the entries and they are estimated…
Complementary reductions for two qubits
Denes Petz, Jonas Kahn
In connection with optimal state determination for two qubits, the question was raised about the maximum number of pairwise complementary reductions. The main result of the paper t…
State tomography for two qubits using reduced densities
D. Petz, K. M. Hangos, A. Szanto +1
The optimal state determination (or tomography) is studied for a composite system of two qubits when measurements can be performed on one of the qubits and interactions of the two…
Sufficiency in quantum statistical inference. A survey with examples
Anna Jencova, Denes Petz
This paper attempts to give an overview about sufficiency in the setting of quantum statistics. The basic concepts are treated paralelly to the the measure theoretic case. It turns…