Dynamical, thermal, and ground-state multiparameter quantum metrology: Fundamental limits and their attainability in magnetometry

Riccardo Pedroni, Víctor Izquierdo, Advay Burte +3

We consider the simultaneous estimation of multiple parameters in Hamiltonians of the form $H_{\vec{\theta }}=H_{\vec{\theta }}^P+H^C$, where $H_{\vec{\theta }}^P$ encodes the unknown parameters and $H…