Multi-parameter quantum metrology

• Published in: Advances in physics: X Vol. 1; no. 4; pp. 621 - 639
• Main Authors: Szczykulska, Magdalena, Baumgratz, Tillmann, Datta, Animesh
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 03.07.2016; Taylor & Francis Ltd
• Subjects: (quantum) Fisher information matrix; 03.65.Ta Foundations of quantum mechanics; 03.67.-a Quantum information; 06.20.Dk Measurement and error theory; 42.50.-p Quantum optics; Cramér-Rao bound; Gravitational waves; Heisenberg scaling; measurement theory; multi-parameter estimation; Parameter estimation; Physics; Probability; Quantum metrology; Quantum physics; Random variables; Standard deviation; United Kingdom > UK

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 quantum-limited local estimation theory of multiple parameters that underlies these advances...