Estimating mixed quantum states

Abstract

We discuss single adaptive measurements for the estimation of mixed quantum states of qubits. The results are compared to the optimal estimation schemes using collective measurements. We also demonstrate that the advantage of collective measurements increases when the degree of mixing of the quantum states increases.

RevTeX, 7 pages, 4 figures

References in corpus (1)

• Universality of optimal measurements

Cited by in corpus (12)

• Fundamentals of Quantum Information Theory
• Minimal qubit tomography
• Estimating the spectrum of a density operator
• Optimal full estimation of qubit mixed states
• Collective vs local measurements in qubit mixed state estimation
• Adaptive experimental design for one-qubit state estimation with finite data based on a statistical update criterion
• Quantum state estimation and large deviations
• Quantum Thermometry
• Point Estimation of States of Finite Quantum Systems
• Attainability of the quantum information bound in pure state models
• Increased Efficiency of Quantum State Estimation Using Non-Separable Measurements
• Simultaneous model selection and parameter estimation: A superconducting qubit coupled to a bath of incoherent two-level systems