Efficiency of quantum state tomography for qubits
Koichi Yamagata
TL;DR
This paper analyzes the efficiency of quantum state tomography for qubits using quantum parameter estimation theory, revealing that optimal efficiency depends on specific weighting schemes.
Contribution
It demonstrates that quantum state tomography is only optimal under particular weighted conditions, providing insights into measurement strategies.
Findings
Optimality depends on specific weighting schemes
Tomography efficiency varies with measurement weights
Guidelines for improving quantum state estimation
Abstract
The efficiency of quantum state tomography is discussed from the point of view of quantum parameter estimation theory, in which the trace of the weighted covariance is to be minimized. It is shown that tomography is optimal only when a special weight is adopted.
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Mechanics and Applications · Cold Atom Physics and Bose-Einstein Condensates