Multi-parameter Quantum Metrology
Magdalena Szczykulska, Tillmann Baumgratz, Animesh Datta
TL;DR
This paper reviews the field of multi-parameter quantum metrology, emphasizing its potential for enhanced precision over classical methods, and discusses recent advances, challenges, and open questions.
Contribution
It provides a comprehensive overview of multi-parameter quantum metrology, summarizing key results and recent developments in the field.
Findings
Multi-parameter quantum estimation can outperform classical precision limits.
Recent advances have expanded understanding of quantum limits in multi-parameter estimation.
Open challenges include practical implementation and understanding of quantum correlations.
Abstract
The simultaneous quantum estimation of multiple parameters can provide a better precision than estimating them individually. This is an effect that is impossible classically. We review the rich background of multi-parameter quantum metrology, some of the main results in the field and its recent advances. We close by highlighting future challenges and open questions.
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